SNAIL Colourful MTB Bike Chainring. Size: 32T, 34T, 36T, 38T, 40T, 42T. Weight: 41g (32T); 52g (34T); 55g (36T); 70g (38T); 75g (40T); 92g (42T). Narrow Wide Teeth: The new narrow-wide teeth design increases chain retention, wear life, and reduces dropping chain/ friction/ noise etc.