Hope Spiderless Retainer Chainring - Direct Mount - Bosch - 51-53mm Chainline - Round - 34T - 9-12 Speed - Orange - Alloy eBay The chain guide backplate is

The chain guide backplate is precision machined from 6061 alloy

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Sole Materials: XC12 Carbon midsole with rubber sole and TPU tread inserts

Pulse: 200 lumens - 8 hours battery life

This design also provides both horizontal and vertical offset to the bikes on the carrier which provides even better bike separation and lowers the possibility of contact between the bikes

Hope Spiderless Retainer Chainring - Direct Mount - Bosch - 51-53mm Chainline - Round - 34T - 9-12 Speed - Orange - Alloy eBay The chain guide backplate isHope Spiderless Retainer Chainrings allow for the use of smaller chainrings by mounting directly to the Hope Crank interface. Made from a lightweight Aluminium, these are designed to hold on to the chain while saving weight over a normal spider and ring combination. Specs: Material: CNC machined 7075 T6 Aluminium Finish: Hard anodised Speed: 9, 10 and 11 Speed Tooth Profile: Narrow wide Intended Chainline: 51 53mm (Boost 148) Narrow wide tooth profile