Planet Bike Shifty Grips Mid-Mount bike grips are designed as an ergonomic solution to anyone riding with a one-by front crank with a Gripshift™ or other twist shift style rear shifter. They're ideal for any rider who wants locking grips that still leave room for bar ends or a mirror. The left side is a standard 128mm opened end grip and the right side is shorter (only 93.5mm) to accommodate a twist style grip. Both come with an innovative expanding bolt mid grip mounting system. This design ensures that they securely fasten to your handlebars while leaving an open end for bar ends or mirrors. The Shifty Grips feature a broad ergonomic palm platform that supports your hands, warding off fatigue and keeping them comfortable. The underside of the grip is enhanced with a micro texture to engage with your fingertips to create a positive point of contact between you and your bike. The grips' all-weather non-slip texture ensures a steady hold no matter the conditions. Say goodbye to tired hands and tingling fingertips during your rides. Perfect replacement grips for anyone with a twist shift bike, including many one-by electric bike models, the Shifty Grip Duos are the upgrade you've been waiting for.