The Promax SL-1 stem lock adds extra strength and a level of added protection against losing your front wheel and fork legs in the event of a broken steerer tube, as well as a more secure headset than the old star nut.
- For 1″ and 1-1/8″ Threadless Headsets only
- Cold forged and fully CNC-machined from 7075 Alloy
- Weight: 72 grams













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