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Item # ISC-4

Internal Seat Tube Clamp

Clamping directly to freshly painted or ultra thin-walled frame tubing can cause inadvertent damage. The new ISC-4 securely holds most bikes without clamping on any frame tube. To use, simply insert the ISC-4 into the frame’s seat tube, tighten the knob, and clamp into any Park Tool Repair Stand. The ISC-4’s hex-shaped shaft resists twisting while clamped in the stand. Works with a huge range of round seat tube sizes—anything with an inside diameter of 24mm to 32mm.

NOTE: Some seat tubes use an internal sleeve.  Do not insert the ISC-4 fully into frame with sleeves.



Buy online or find a local retailer (North America only). International Distributors.

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