PARTS AND ACCESSORIES › Overfast Lightweight Alloy Chainring - from 159g, 50-34/52-36 Image 1 of 6 Image 2 of 6 Image 3 of 6 Image 4 of 6 Image 5 of 6 Image 6 of 6 Overfast Lightweight Alloy Chainring - from 159g, 50-34/52-36 $158.00 Hollowed 7075-T651 aluminium chainrings that are lighter than most carbon alternatives.50-34T (approx. 159g) or 52-36T (approx. 174g)110 x 4 BCD7075-T651 aluminium Ratio: 50-34T 52-36T Purchase Added! Hollowed 7075-T651 aluminium chainrings that are lighter than most carbon alternatives.50-34T (approx. 159g) or 52-36T (approx. 174g)110 x 4 BCD7075-T651 aluminium