Freeline Black Rear Hub 50x90mm White and a Velcro front fixing

and a Velcro front fixing strap for quick adjustments

If you need a narrower rear

If you want a kart helmet that looks as fast as it feels

and secure support arms to keep your kart steady during maintenance or transport

Freeline Black Rear Hub 50x90mm White and a Velcro front fixingThe Freeline Black Rear Hub 50x90mm is a genuine Freeline OEM hub for 50mm rear axles on Birel ART and compatible kart chassis. Precision machined from alloy with a black anodised finish, it provides reliable axle clamping and a clean appearance. At 90mm in length, it offers a compact rear hub profile suited to a wide range of setup configurations. Key Specifications Axle bore: 50 mm Hub length: 90 mm Material: Alloy Finish: Black anodised