{"product_id":"go-kart-senzo-otk-tonykart-50mm-rear-axle-karting-racing-race","title":"Senzo OTK (TonyKart) 50mm Rear Axle","description":"\u003clink rel=\"stylesheet\" href=\"https:\/\/cdn.jsdelivr.net\/npm\/@tabler\/icons-webfont@latest\/tabler-icons.min.css\"\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eSenzo Rear Axle 50mm OTK\u003c\/strong\u003e is a high-quality aftermarket axle built specifically for OTK-based chassis including Tony Kart, Exprit, Kosmic, Redspeed and Energy. Same fitment as genuine OTK, engineered for strength and consistency, at a sharper price point.\u003c\/p\u003e\n\n\u003cp\u003eAvailable in \u003cstrong\u003eseven stiffness grades\u003c\/strong\u003e — more range than the genuine OTK lineup offers — so you can genuinely dial your setup to conditions rather than just running whatever's already in the kart. Available in \u003cstrong\u003e1000mm, 1030mm and 1040mm\u003c\/strong\u003e lengths.\u003c\/p\u003e\n\n\u003cp\u003eAxle stiffness is one of the most effective tuning tools on a kart. A softer axle flexes more, lifting the inside rear wheel and generating rear grip — ideal when the track is green, cold, or damp. A harder axle limits that flex, reducing grip and preventing the rear from overworking on high-traction surfaces. Get it right and it's worth more than a full day of chassis adjustments.\u003c\/p\u003e\n\n\u003cstyle\u003e\n  .senzo-axle-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 10px; margin: 1rem 0 1.5rem; }\n  .senzo-axle-card { background: #fff; border-radius: 12px; border: 1px solid #e5e7eb; padding: 1rem; display: flex; flex-direction: column; gap: 8px; }\n  .senzo-grade-badge { border-radius: 6px; padding: 6px 10px; font-size: 13px; font-weight: 600; text-align: center; letter-spacing: 0.03em; }\n  .senzo-dot-row { display: flex; gap: 4px; align-items: center; flex-wrap: wrap; }\n  .senzo-dot { width: 10px; height: 10px; border-radius: 50%; }\n  .senzo-dot-empty { background: #f3f4f6; border: 1px solid #d1d5db; }\n  .senzo-stat-label { font-size: 11px; color: #6b7280; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 4px; }\n  .senzo-condition-tag { display: inline-flex; align-items: center; gap: 4px; font-size: 11px; padding: 3px 7px; border-radius: 4px; margin: 2px 2px 0 0; }\n  .senzo-spec-row { display: flex; justify-content: space-between; align-items: center; border-top: 1px solid #f3f4f6; padding-top: 8px; margin-top: 4px; }\n  .senzo-stat-val { font-size: 12px; font-weight: 600; }\n  .senzo-bar-section { background: #fff; border-radius: 12px; border: 1px solid #e5e7eb; padding: 1rem 1.25rem; margin-bottom: 10px; }\n  .senzo-section-title { font-size: 12px; font-weight: 600; color: #9ca3af; text-transform: uppercase; letter-spacing: 0.07em; margin: 0 0 4px; }\n  .senzo-scale-ends { display: flex; justify-content: space-between; font-size: 11px; color: #9ca3af; margin-top: 2px; }\n  .senzo-bar-row { display: flex; align-items: center; gap: 10px; margin: 6px 0; }\n  .senzo-bar-label { width: 110px; font-size: 12px; color: #6b7280; flex-shrink: 0; }\n  .senzo-bar-flex { flex: 1; }\n  .senzo-bar-track { position: relative; height: 10px; border-radius: 5px; background: #f3f4f6; overflow: hidden; }\n  .senzo-bar-fill { height: 100%; border-radius: 5px; }\n  .senzo-bar-rm { font-size: 11px; font-weight: 600; width: 95px; text-align: right; flex-shrink: 0; }\n  .senzo-default-banner { background: #f0f4ff; border-left: 4px solid #1e2d6b; padding: 14px 18px; border-radius: 4px; margin-bottom: 1.5rem; font-size: 13px; line-height: 1.5; }\n  .senzo-otk-tag { font-size: 10px; font-weight: 700; background: #f3f4f6; color: #6b7280; border-radius: 4px; padding: 2px 5px; letter-spacing: 0.04em; white-space: nowrap; }\n  .senzo-card-header { display: flex; justify-content: space-between; align-items: center; gap: 6px; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"senzo-default-banner\"\u003e\n  ⭐ \u003cstrong style=\"color:#1e2d6b;\"\u003eNot sure where to start?\u003c\/strong\u003e Go for \u003cstrong\u003eMedium \/ Green (Type N)\u003c\/strong\u003e — it's the benchmark grade used by most drivers in dry conditions. Once you know how the kart feels on a medium, you'll know which direction to move.\n\u003c\/div\u003e\n\n\u003cdiv class=\"senzo-bar-section\"\u003e\n  \u003cp class=\"senzo-section-title\"\u003eAxle stiffness scale\u003c\/p\u003e\n  \u003cdiv class=\"senzo-scale-ends\"\u003e\n\u003cspan\u003eSofter — more grip\u003c\/span\u003e\u003cspan\u003eHarder — less grip\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv style=\"height:10px;border-radius:5px;margin:8px 0 4px;background:linear-gradient(to right,#e8732a,#e53935,#7b2fbe,#3cb371,#d4a800,#f4c430,#1565c0);\"\u003e\u003c\/div\u003e\n  \u003cdiv style=\"display:flex;justify-content:space-between;font-size:10px;color:#9ca3af;\"\u003e\n    \u003cspan\u003eExtra Soft\u003c\/span\u003e\u003cspan\u003eSoft\u003c\/span\u003e\u003cspan\u003eMed Soft\u003c\/span\u003e\u003cspan\u003eMedium\u003c\/span\u003e\u003cspan\u003eMed Hard\u003c\/span\u003e\u003cspan\u003eHard Soft\u003c\/span\u003e\u003cspan\u003eHard\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"senzo-axle-grid\"\u003e\n\n  \u003cdiv class=\"senzo-axle-card\"\u003e\n    \u003cdiv class=\"senzo-grade-badge\" style=\"background:#FDF0E8;color:#7A3000;\"\u003eExtra Soft\u003c\/div\u003e\n    \u003cdiv class=\"senzo-card-header\"\u003e\n      \u003cdiv class=\"senzo-dot-row\"\u003e\n        \u003cdiv class=\"senzo-dot\" style=\"background:#e8732a;\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot senzo-dot-empty\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot senzo-dot-empty\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot senzo-dot-empty\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot senzo-dot-empty\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot senzo-dot-empty\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot senzo-dot-empty\"\u003e\u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cspan class=\"senzo-otk-tag\"\u003eType U\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cdiv\u003e\n      \u003cdiv class=\"senzo-stat-label\"\u003eBest for\u003c\/div\u003e\n      \u003cspan class=\"senzo-condition-tag\" style=\"background:#FDF0E8;color:#7A3000;\"\u003e\u003ci class=\"ti ti-cloud-rain\"\u003e\u003c\/i\u003e Wet \/ damp\u003c\/span\u003e\n      \u003cspan class=\"senzo-condition-tag\" style=\"background:#FDF0E8;color:#7A3000;\"\u003e\u003ci class=\"ti ti-temperature-minus\"\u003e\u003c\/i\u003e Cold track\u003c\/span\u003e\n      \u003cspan class=\"senzo-condition-tag\" style=\"background:#FDF0E8;color:#7A3000;\"\u003e\u003ci class=\"ti ti-feather\"\u003e\u003c\/i\u003e Light driver\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"senzo-spec-row\"\u003e\n      \u003cspan class=\"senzo-stat-label\"\u003eRm\u003c\/span\u003e\n      \u003cspan class=\"senzo-stat-val\" style=\"color:#7A3000;\"\u003e300–380 N\/mm²\u003c\/span\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"senzo-axle-card\"\u003e\n    \u003cdiv class=\"senzo-grade-badge\" style=\"background:#FDECEC;color:#7A0C0C;\"\u003eSoft\u003c\/div\u003e\n    \u003cdiv class=\"senzo-card-header\"\u003e\n      \u003cdiv class=\"senzo-dot-row\"\u003e\n        \u003cdiv class=\"senzo-dot\" style=\"background:#e53935;\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot\" style=\"background:#e53935;\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot senzo-dot-empty\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot senzo-dot-empty\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot senzo-dot-empty\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot senzo-dot-empty\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot senzo-dot-empty\"\u003e\u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cspan class=\"senzo-otk-tag\"\u003eType Q\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cdiv\u003e\n      \u003cdiv class=\"senzo-stat-label\"\u003eBest for\u003c\/div\u003e\n      \u003cspan class=\"senzo-condition-tag\" style=\"background:#FDECEC;color:#7A0C0C;\"\u003e\u003ci class=\"ti ti-cloud\"\u003e\u003c\/i\u003e Low grip\u003c\/span\u003e\n      \u003cspan class=\"senzo-condition-tag\" style=\"background:#FDECEC;color:#7A0C0C;\"\u003e\u003ci class=\"ti ti-road\"\u003e\u003c\/i\u003e Green track\u003c\/span\u003e\n      \u003cspan class=\"senzo-condition-tag\" style=\"background:#FDECEC;color:#7A0C0C;\"\u003e\u003ci class=\"ti ti-temperature\"\u003e\u003c\/i\u003e Cool \/ fresh\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"senzo-spec-row\"\u003e\n      \u003cspan class=\"senzo-stat-label\"\u003eRm\u003c\/span\u003e\n      \u003cspan class=\"senzo-stat-val\" style=\"color:#7A0C0C;\"\u003e350–400 N\/mm²\u003c\/span\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"senzo-axle-card\"\u003e\n    \u003cdiv class=\"senzo-grade-badge\" style=\"background:#F3EAFD;color:#4A1278;\"\u003eMedium Soft\u003c\/div\u003e\n    \u003cdiv class=\"senzo-card-header\"\u003e\n      \u003cdiv class=\"senzo-dot-row\"\u003e\n        \u003cdiv class=\"senzo-dot\" style=\"background:#7b2fbe;\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot\" style=\"background:#7b2fbe;\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot\" style=\"background:#7b2fbe;\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot senzo-dot-empty\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot senzo-dot-empty\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot senzo-dot-empty\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot senzo-dot-empty\"\u003e\u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cspan class=\"senzo-otk-tag\" style=\"color:#bbb;\"\u003e—\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cdiv\u003e\n      \u003cdiv class=\"senzo-stat-label\"\u003eBest for\u003c\/div\u003e\n      \u003cspan class=\"senzo-condition-tag\" style=\"background:#F3EAFD;color:#4A1278;\"\u003e\u003ci class=\"ti ti-adjustments-horizontal\"\u003e\u003c\/i\u003e Between Q \u0026amp; N\u003c\/span\u003e\n      \u003cspan class=\"senzo-condition-tag\" style=\"background:#F3EAFD;color:#4A1278;\"\u003e\u003ci class=\"ti ti-minus\"\u003e\u003c\/i\u003e Slightly soft track\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"senzo-spec-row\"\u003e\n      \u003cspan class=\"senzo-stat-label\"\u003eRm\u003c\/span\u003e\n      \u003cspan class=\"senzo-stat-val\" style=\"color:#4A1278;\"\u003e470–500 N\/mm²\u003c\/span\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"senzo-axle-card\" style=\"border-color:#3cb371;\"\u003e\n    \u003cdiv class=\"senzo-grade-badge\" style=\"background:#E8F7EE;color:#1a5e37;\"\u003eMedium ⭐\u003c\/div\u003e\n    \u003cdiv class=\"senzo-card-header\"\u003e\n      \u003cdiv class=\"senzo-dot-row\"\u003e\n        \u003cdiv class=\"senzo-dot\" style=\"background:#3cb371;\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot\" style=\"background:#3cb371;\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot\" style=\"background:#3cb371;\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot\" style=\"background:#3cb371;\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot senzo-dot-empty\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot senzo-dot-empty\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot senzo-dot-empty\"\u003e\u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cspan class=\"senzo-otk-tag\"\u003eType N\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cdiv\u003e\n      \u003cdiv class=\"senzo-stat-label\"\u003eBest for\u003c\/div\u003e\n      \u003cspan class=\"senzo-condition-tag\" style=\"background:#E8F7EE;color:#1a5e37;\"\u003e\u003ci class=\"ti ti-sun\"\u003e\u003c\/i\u003e Dry conditions\u003c\/span\u003e\n      \u003cspan class=\"senzo-condition-tag\" style=\"background:#E8F7EE;color:#1a5e37;\"\u003e\u003ci class=\"ti ti-settings-2\"\u003e\u003c\/i\u003e General use\u003c\/span\u003e\n      \u003cspan class=\"senzo-condition-tag\" style=\"background:#E8F7EE;color:#1a5e37;\"\u003e\u003ci class=\"ti ti-user\"\u003e\u003c\/i\u003e Most drivers\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"senzo-spec-row\"\u003e\n      \u003cspan class=\"senzo-stat-label\"\u003eRm\u003c\/span\u003e\n      \u003cspan class=\"senzo-stat-val\" style=\"color:#1a5e37;\"\u003e480–550 N\/mm²\u003c\/span\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"senzo-axle-card\"\u003e\n    \u003cdiv class=\"senzo-grade-badge\" style=\"background:#FDF6DC;color:#6B4A00;\"\u003eMedium Hard\u003c\/div\u003e\n    \u003cdiv class=\"senzo-card-header\"\u003e\n      \u003cdiv class=\"senzo-dot-row\"\u003e\n        \u003cdiv class=\"senzo-dot\" style=\"background:#d4a800;\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot\" style=\"background:#d4a800;\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot\" style=\"background:#d4a800;\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot\" style=\"background:#d4a800;\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot\" style=\"background:#d4a800;\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot senzo-dot-empty\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot senzo-dot-empty\"\u003e\u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cspan class=\"senzo-otk-tag\" style=\"color:#bbb;\"\u003e—\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cdiv\u003e\n      \u003cdiv class=\"senzo-stat-label\"\u003eBest for\u003c\/div\u003e\n      \u003cspan class=\"senzo-condition-tag\" style=\"background:#FDF6DC;color:#6B4A00;\"\u003e\u003ci class=\"ti ti-temperature-plus\"\u003e\u003c\/i\u003e Warm track\u003c\/span\u003e\n      \u003cspan class=\"senzo-condition-tag\" style=\"background:#FDF6DC;color:#6B4A00;\"\u003e\u003ci class=\"ti ti-weight\"\u003e\u003c\/i\u003e Heavier driver\u003c\/span\u003e\n      \u003cspan class=\"senzo-condition-tag\" style=\"background:#FDF6DC;color:#6B4A00;\"\u003e\u003ci class=\"ti ti-arrow-up\"\u003e\u003c\/i\u003e High grip\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"senzo-spec-row\"\u003e\n      \u003cspan class=\"senzo-stat-label\"\u003eRm\u003c\/span\u003e\n      \u003cspan class=\"senzo-stat-val\" style=\"color:#6B4A00;\"\u003e500–650 N\/mm²\u003c\/span\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"senzo-axle-card\"\u003e\n    \u003cdiv class=\"senzo-grade-badge\" style=\"background:#FEFBE6;color:#6B5500;\"\u003eHard Soft\u003c\/div\u003e\n    \u003cdiv class=\"senzo-card-header\"\u003e\n      \u003cdiv class=\"senzo-dot-row\"\u003e\n        \u003cdiv class=\"senzo-dot\" style=\"background:#f4c430;\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot\" style=\"background:#f4c430;\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot\" style=\"background:#f4c430;\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot\" style=\"background:#f4c430;\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot\" style=\"background:#f4c430;\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot\" style=\"background:#f4c430;\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot senzo-dot-empty\"\u003e\u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cspan class=\"senzo-otk-tag\" style=\"color:#bbb;\"\u003e—\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cdiv\u003e\n      \u003cdiv class=\"senzo-stat-label\"\u003eBest for\u003c\/div\u003e\n      \u003cspan class=\"senzo-condition-tag\" style=\"background:#FEFBE6;color:#6B5500;\"\u003e\u003ci class=\"ti ti-flame\"\u003e\u003c\/i\u003e Very high grip\u003c\/span\u003e\n      \u003cspan class=\"senzo-condition-tag\" style=\"background:#FEFBE6;color:#6B5500;\"\u003e\u003ci class=\"ti ti-checkbox\"\u003e\u003c\/i\u003e Rubbered-in\u003c\/span\u003e\n      \u003cspan class=\"senzo-condition-tag\" style=\"background:#FEFBE6;color:#6B5500;\"\u003e\u003ci class=\"ti ti-trophy\"\u003e\u003c\/i\u003e Competitive use\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"senzo-spec-row\"\u003e\n      \u003cspan class=\"senzo-stat-label\"\u003eRm\u003c\/span\u003e\n      \u003cspan class=\"senzo-stat-val\" style=\"color:#6B5500;\"\u003e650–800 N\/mm²\u003c\/span\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"senzo-axle-card\"\u003e\n    \u003cdiv class=\"senzo-grade-badge\" style=\"background:#E6EEF9;color:#0C2E6B;\"\u003eHard\u003c\/div\u003e\n    \u003cdiv class=\"senzo-card-header\"\u003e\n      \u003cdiv class=\"senzo-dot-row\"\u003e\n        \u003cdiv class=\"senzo-dot\" style=\"background:#1565c0;\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot\" style=\"background:#1565c0;\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot\" style=\"background:#1565c0;\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot\" style=\"background:#1565c0;\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot\" style=\"background:#1565c0;\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot\" style=\"background:#1565c0;\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"senzo-dot\" style=\"background:#1565c0;\"\u003e\u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cspan class=\"senzo-otk-tag\"\u003eType H\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cdiv\u003e\n      \u003cdiv class=\"senzo-stat-label\"\u003eBest for\u003c\/div\u003e\n      \u003cspan class=\"senzo-condition-tag\" style=\"background:#E6EEF9;color:#0C2E6B;\"\u003e\u003ci class=\"ti ti-flame\"\u003e\u003c\/i\u003e Max grip\u003c\/span\u003e\n      \u003cspan class=\"senzo-condition-tag\" style=\"background:#E6EEF9;color:#0C2E6B;\"\u003e\u003ci class=\"ti ti-temperature-plus\"\u003e\u003c\/i\u003e Hot conditions\u003c\/span\u003e\n      \u003cspan class=\"senzo-condition-tag\" style=\"background:#E6EEF9;color:#0C2E6B;\"\u003e\u003ci class=\"ti ti-bolt\"\u003e\u003c\/i\u003e Aggressive drivers\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"senzo-spec-row\"\u003e\n      \u003cspan class=\"senzo-stat-label\"\u003eRm\u003c\/span\u003e\n      \u003cspan class=\"senzo-stat-val\" style=\"color:#0C2E6B;\"\u003e800–900 N\/mm²\u003c\/span\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"senzo-bar-section\"\u003e\n  \u003cp class=\"senzo-section-title\"\u003eStiffness by grade (tensile strength Rm)\u003c\/p\u003e\n  \u003cdiv class=\"senzo-bar-row\"\u003e\n    \u003cspan class=\"senzo-bar-label\"\u003eExtra Soft\u003c\/span\u003e\n    \u003cdiv class=\"senzo-bar-flex\"\u003e\u003cdiv class=\"senzo-bar-track\"\u003e\u003cdiv class=\"senzo-bar-fill\" style=\"width:37%;background:#e8732a;\"\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\n    \u003cspan class=\"senzo-bar-rm\" style=\"color:#7A3000;\"\u003e300–380 N\/mm²\u003c\/span\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"senzo-bar-row\"\u003e\n    \u003cspan class=\"senzo-bar-label\"\u003eSoft\u003c\/span\u003e\n    \u003cdiv class=\"senzo-bar-flex\"\u003e\u003cdiv class=\"senzo-bar-track\"\u003e\u003cdiv class=\"senzo-bar-fill\" style=\"width:44%;background:#e53935;\"\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\n    \u003cspan class=\"senzo-bar-rm\" style=\"color:#7A0C0C;\"\u003e350–400 N\/mm²\u003c\/span\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"senzo-bar-row\"\u003e\n    \u003cspan class=\"senzo-bar-label\"\u003eMedium Soft\u003c\/span\u003e\n    \u003cdiv class=\"senzo-bar-flex\"\u003e\u003cdiv class=\"senzo-bar-track\"\u003e\u003cdiv class=\"senzo-bar-fill\" style=\"width:54%;background:#7b2fbe;\"\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\n    \u003cspan class=\"senzo-bar-rm\" style=\"color:#4A1278;\"\u003e470–500 N\/mm²\u003c\/span\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"senzo-bar-row\"\u003e\n    \u003cspan class=\"senzo-bar-label\"\u003eMedium ⭐\u003c\/span\u003e\n    \u003cdiv class=\"senzo-bar-flex\"\u003e\u003cdiv class=\"senzo-bar-track\"\u003e\u003cdiv class=\"senzo-bar-fill\" style=\"width:60%;background:#3cb371;\"\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\n    \u003cspan class=\"senzo-bar-rm\" style=\"color:#1a5e37;\"\u003e480–550 N\/mm²\u003c\/span\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"senzo-bar-row\"\u003e\n    \u003cspan class=\"senzo-bar-label\"\u003eMedium Hard\u003c\/span\u003e\n    \u003cdiv class=\"senzo-bar-flex\"\u003e\u003cdiv class=\"senzo-bar-track\"\u003e\u003cdiv class=\"senzo-bar-fill\" style=\"width:70%;background:#d4a800;\"\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\n    \u003cspan class=\"senzo-bar-rm\" style=\"color:#6B4A00;\"\u003e500–650 N\/mm²\u003c\/span\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"senzo-bar-row\"\u003e\n    \u003cspan class=\"senzo-bar-label\"\u003eHard Soft\u003c\/span\u003e\n    \u003cdiv class=\"senzo-bar-flex\"\u003e\u003cdiv class=\"senzo-bar-track\"\u003e\u003cdiv class=\"senzo-bar-fill\" style=\"width:83%;background:#f4c430;\"\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\n    \u003cspan class=\"senzo-bar-rm\" style=\"color:#6B5500;\"\u003e650–800 N\/mm²\u003c\/span\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"senzo-bar-row\"\u003e\n    \u003cspan class=\"senzo-bar-label\"\u003eHard\u003c\/span\u003e\n    \u003cdiv class=\"senzo-bar-flex\"\u003e\u003cdiv class=\"senzo-bar-track\"\u003e\u003cdiv class=\"senzo-bar-fill\" style=\"width:100%;background:#1565c0;\"\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\n    \u003cspan class=\"senzo-bar-rm\" style=\"color:#0C2E6B;\"\u003e800–900 N\/mm²\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e50mm diameter\u003c\/strong\u003e rear axle\u003c\/li\u003e\n  \u003cli\u003eAvailable in \u003cstrong\u003e1000mm, 1030mm and 1040mm\u003c\/strong\u003e lengths\u003c\/li\u003e\n  \u003cli\u003eCompatible with \u003cstrong\u003eTony Kart, Exprit, Kosmic, Redspeed and Energy\u003c\/strong\u003e chassis\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e7 stiffness grades\u003c\/strong\u003e — more range than the genuine OTK lineup\u003c\/li\u003e\n  \u003cli\u003eGrades U, Q, N and H \u003cstrong\u003edirectly match genuine OTK equivalents\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eHigh-strength steel construction for race reliability\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Choose the Senzo OTK Axle?\u003c\/h3\u003e\n\u003cp\u003eSeven stiffness grades means you've got a genuine answer for every condition — not just a choice between soft and hard. Whether you're chasing grip on a damp morning or trying to free up the rear on a high-rubber championship circuit, there's an exact grade for it. Most competitive drivers keep two or three stiffnesses in the van — a well-chosen axle swap is worth more than a full day of chassis tweaking.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKKC Kart Components\u003c\/strong\u003e — trusted karting parts built for performance, durability, and value on race day.\u003c\/p\u003e","brand":"Senzo","offers":[{"title":"1000 \/ Soft \/ Type Q","offer_id":67605113864429,"sku":"AX50S1000","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"1000 \/ Medium \/ Type N","offer_id":67605113897197,"sku":"AX50M1000","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"1000 \/ Hard \/ Type H","offer_id":67605113929965,"sku":"AX50H1000","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"1030 \/ Extra Soft \/ Type U","offer_id":67605113962733,"sku":"AX50SS1030","price":80.0,"currency_code":"GBP","in_stock":true},{"title":"1030 \/ Soft \/ Type Q","offer_id":67605113995501,"sku":"AX50S1030","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"1030 \/ Medium Soft","offer_id":67605114028269,"sku":"AX50M1030-SP","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"1030 \/ Medium \/ Type N","offer_id":67605114061037,"sku":"AX50M1030","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"1030 \/ Medium Hard","offer_id":67605114093805,"sku":"AX50M1030-G","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"1030 \/ Hard Soft","offer_id":67605114126573,"sku":"AX50A1030","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"1030 \/ Hard \/ Type H","offer_id":67605114159341,"sku":"AX50H1030","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"1040 \/ Extra Soft \/ Type U","offer_id":67605114192109,"sku":"AX50SS","price":80.0,"currency_code":"GBP","in_stock":true},{"title":"1040 \/ Soft \/ Type Q","offer_id":67605114224877,"sku":"AX50S","price":80.0,"currency_code":"GBP","in_stock":true},{"title":"1040 \/ Medium \/ Type N","offer_id":67605114257645,"sku":"AX50M","price":80.0,"currency_code":"GBP","in_stock":true},{"title":"1040 \/ Hard \/ Type H","offer_id":67605114290413,"sku":"AX50H","price":80.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0649\/5590\/8333\/files\/Screenshot2025-07-02at14.50.15.png?v=1790765095","url":"https:\/\/senzokart.com\/products\/go-kart-senzo-otk-tonykart-50mm-rear-axle-karting-racing-race","provider":"Senzo Precision Kart Parts","version":"1.0","type":"link"}