While Absoluteblack's oval chainrings with their narrow/wide teeth profiles don't require any chain retention to keep the chain firmly in its correct position

BARREL - Painted steel

Spank 350 Vibrocore Rims:

Material: The lever body and caliper are made from aluminium

a nudge every now and then doesn't go astray

PNW Components Loam Lever Silicone Thumb Pad - Pacific Blue PLP|Colour While Absoluteblack's oval chainrings withIts been called the yoga mat for your thumb, and while the extra grip is excellent, the Loam Lever Silicone Thumb Pad looks amazing too! Spice up your Loam Lever with a splash of colour coordinated goodness and get that "Pro" look (not guaranteed to make you ride any better though)