7/8” inside diameter

ProVelo Most Comfortable Bike Seat for Men Women - Wide Soft Padded Bicycle Saddle – LED Taillight – Clamp and Protection Cover Included – Comfort Memory Foam Cushion - Waterproof Leather Product Features:Size:Length: 11 inchWidth: 8.3 inchWeight: 1.8 poundsTaillight:5 pcs LED red bright lights, powered by 1 CR2032 battery (included) to attract the right sort of attention.3 lighting modes: steady, flashing and sequential – can be switched during riding. Work time up to 36 hrs.Waterproof Protection Cover is included! Protect your seat from dust, sun and rain.Why you should try ProVelo bicycle seat:- Bright built-in LED taillight is a must-have to make your riding safer!- Ergonomic design provides desired support while allowing free movement of your thighs- Waterproof, soft & elastic durable PVC leather feels comfortable, reduces any abrasion or chafing- Padded by gel memory foam, adapts to the contours of your bums and enhances the effectiveness of support- Double spring rubber balls suspension helps alleviate discomforting impact during a ride- Works equally well for upright, regular, pro-riding or stand up positions – adjustable seat angle- Multi-functional and universal replacement saddle for mountain bike, mtb, beach cruisers, road, stationary fixed gear or exercise indoor cycling, for adults, men, women- Superior quality materials offer high wear/tear resistance and ensure durability- Comfort, safety & convenience encourage you to take out the bicycle more oftenFAQ – Will this saddle fit my bike?Answer - ProVelo bicycle seat has a universal rail system and mounting clamp that allows easy mounting on almost all standard seatposts – be it dual-track or clamp tube. The clamp has 7/8" inside diameter.