Notice: pls submit order with note your bolts size Before placing an order, please note the screw specifications or contact customer service to tell your bicycle model, so that we can give you screw specifications Differient brand frame using differient bolt FNHON DA HON alloy fork use M23mmx1.0, Steel fork use M26x1.0 bolts, SILVEROCK carbon fork use M18mmx1.0 SILVEROCK headtube update 1.The torque value is increased to 12N.m, which can withstand stronger torque values and increase the strength of the head tube. 2.Screw hidden design, more beautiful, the appearance of the improved wind exquisite Product information: Material: carbon Weight: 441g Length: 33cm 35cm 37cm 42cm Max Load:90kg Pental diameter: 28.6mm Screw: M18 M23 M26 Steel Suitable for small wheel folding bicycles such as Dahon FNHON and other small wheels to modify the plug tube The length you need can be customized according to your needs Pls NOTE us which size bolt you need test your original fork top bolts to make sure same spec , there have choice: M18X1.0 M18X1.25 M18X1.5, M23X1.0,M26X1.0,M24X1.0 Picture display of detailed parts of the head tube How to make sure the nut you need ? Just test your original bolt of your fork, to test the bols thread diameter and the pitch Manual Distinguish between angle Weight：340g/33cm On folding bike review Folding effect display More details Packed

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