Heads up: many models on this page are AI-generated or uploaded untested. They may be misconfigured for the intended application — check the dimensions and tolerances, and verify or edit the model before printing or relying on it.*
Singlespeed 608 Slotted Chain Tensioner
A push-down chain tensioner for singlespeed conversions. It straps to any 12–25 mm chainstay through a 90° V-saddle and two 9 x 3 mm band slots that take zip ties or mini hose clamps, so dropout width doesn't matter. A 608 bearing (22 mm) runs on an M8 bolt through an 8.5 mm slot with 23 mm of travel, and two 5 mm cheeks with a 12 mm gap keep 1/8 in and 3/32 in chain on the roller. Shim the bearing to centre with M8 washers.
GT2 Belt Tensioner Cartridge
A print-in-place GT2 belt tensioner that bolts to any frame face with two M5 screws and T-nuts (holes 64 mm apart, on the 2020 slot centreline) and gives 16 mm of idler travel from a single M3 x 20 screw that self-taps into the 7 mm end wall. The flanged 16 mm idler pulley (7 mm belt channel for 6 mm GT2) prints already captured on its own post, so there is no bearing, shoulder bolt or spring to source; overall 76 x 32 x 33.5 mm, three pieces, one print.