Need to fit a 5mm gear on a 3.17mm motor shaft? These solid little adapters are exactly what you’re looking for. Made from tough aluminum alloy, they’re super lightweight but totally durable—CNC machined to give you a perfect fit without any wobble. You get 3 adapters in the pack, so you’ve got spares or can set up multiple motors. Super easy to slide on and off, no special tools needed. Great if you’re upgrading your RC car, boat, or plane motor and want to use standard 5mm pinions. Specs: Inner diameter is 3.17mm, outer is 5mm, length is 12.2mm. Color’s a nice silver finish. Works with Hobbywing H-S-P 540/550 motors and EZRUN-3656 models—handy for hobbyists who tweak their setups often. Just pop it on the motor axle, then mount your 5mm gear. Makes motor swaps and upgrades way simpler. No more searching for weird size gears—adapt and go!
