The Specialized SIP Locking Grips are moto cross inspired mountain biking grips. They feature a super tacky material for plenty of grip on your palms, backed up with a strategically placed half-waffle pattern so your fingers don’t slide around. The grips themselves securely lock to your bars so there is no chance of them moving around. The Specialized SIP Locking Grips are available in two different diameters, either 30mm or 32mm. Features Super tacky, yet durable, grip provides superior control. Strategically placed, half-waffle pattern provides better grip & comfort. Moto-inspired design features a waffle relief for maximum thumb wrap/control. Small/ Medium diameter: 30mm Large/X-Large diameter: 32mm