The Fly Tractor XLII is a Fly original-design BMX sprocket CNC machined from solid 6061 aluminium, with a tapered profile - thick at the core and thinner at the teeth - and a recess for the crank arm.

• Material: CNC machined 6061 aluminium
• Size: 25T (also made in 28T)
• Spindle adaptors for 19 mm, 22 mm and 24 mm included
• Weight: 118 g (4.1 oz) for 25T
• Finish: polished