They go inside the rear hub and against the axle to stop the hubs from moving in. There are Ten in the Set. The set Comprises of 2 x 5mm Gold.
eBay
HASSNS Pro 7 36h Rear Hub Bearing 36Holes Freehub MTB Bike Four Palin 32H Rear Hub for 7-12 Speed Noisy Cube Bicycle 6 Pawl Hubs
Aliexpress UK
Kart Tools. None Karting Products. Beta Tools. Tony Kart OTK EBC Brake Pads Pattern Soft FA540S Karting New Kart Parts UK. Kart Adjustable Seat Stay Support Plate Four Hole For Adjustable Seat Stays. Kart 10 Piece Silverline Hex Key T Bar set.
eBay
Koozer xm490 pro k7 cube Mtb hubs rear noisy hub boost 28 32 hole hub 5x141 QR 12x148mm THRU TA Bicycle Hubs HG XD MS 10 11 12s
Aliexpress UK
Kart Tools. Beta Tools. Tony Kart OTK EBC Brake Pads Pattern Soft FA540S Karting New Kart Parts UK. 2 x 50mm x 95mm Gold Rear Hubs. Kart Adjustable Seat Stay Support Plate Four Hole For Adjustable Seat Stays.
eBay
Bike Hub Shaft Mountain Bike Hollow Hub Shaft Quick Release Steel Hub Axle Bike Front Rear Axles Hollow Hub Shaft Lever
Aliexpress UK
Kart Tools. None Karting Products. Beta Tools. Tony Kart OTK EBC Brake Pads Pattern Soft FA540S Karting New Kart Parts UK. 2 x 50mm x 95mm Black Rear Hubs. Kart Adjustable Seat Stay Support Plate Four Hole For Adjustable Seat Stays.
eBay
ARC RT010 002 Front 100 Rear 130 Road Bike Hub Hub 4 pawls 48 clicks NBK Bearing Hub 20 24 Holes Bicycle Hub V brake 8 9 10 11S
Aliexpress UK
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eBay
mi.Xim Bike Hub 32 Holes Mountain MTB Front Rear Hub Disc Brake Beard Hub Solid Shaft Rotary Drum Hubs Bike Parts
Aliexpress UK
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eBay
HASSNS PRO 7 32 holes mtb hubs 7 8 9 10 11 12speed Mtb hubs noisy cube k7 24/32holes hub for bike MTB Rear Hub Quick Release
Aliexpress UK
【Comprehensive Rear End Kit】: Go Kart Axle Kit includes almost all necessary rear end components for DIY enthusiasts who want to rebuild or modify drift bikes, karts or trikes. 1 Go Kart Axle Kit. We'd like to settle any problem in a friendly manner.
eBay
78mm*3 Stud 6 inch 17T Rear Wheel Hub Fit For China 50cc 70cc 90cc 110cc ATV Buggy 168 200F Go Kart Quad Bike Accessories
Aliexpress UK
Versatile Compatibility: Designed to fit a wide range of vehicles and applications. Easy Installation Process: Simply align the key ways in the sprocket, bolt a sprocket to it, install a key in the key way, and tighten the set screws.
eBay
23T Rear 3*M8 Wheel Hub Seat for Chinese 50cc 110cc 125cc 16X8-7145/70-6 Rim Tire ATV Go Kart Buggy Karting ATV UTV Quad Bike
Aliexpress UK