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Bike Fender Stay Eyelet Pinch Clamp
This replaces the snapped plastic stay-end clip on SKS, Decathlon and generic bicycle fenders. It bolts to the fork or frame dropout eyelet with a standard M5 bolt (5.5 mm hole). The fender stay wire goes into a 5.3 mm bore that takes 3 to 5 mm wire, and an M4 bolt with a nut held in a pocket squeezes the split to lock it. The part measures 48 x 16 x 18 mm.
Zip-Tie Fender Stay Bridge Bar
A replacement mid-span fender bridge for bikes that never had one or whose plastic clip broke. It is a 134 mm bar with a 90° V-saddle at each end, and each saddle takes seat stays or fork blades from about 8 to 20 mm across. The stays spread apart as they run down, so you slide the bar along them until it fits and then fix it with four zip ties, which pass through 5 × 2.6 mm tunnels. The fender hangs from a central 5.5 mm M5 clearance hole, and a hex pocket (8.4 mm across flats, 4 mm deep) holds the M5 nut captive.