Canitu Thumb Throttle Adapter for E-Bike Twist-Grip Conversion — 41mm or 37mm, PETG with Stainless Steel Fastener

The Canitu Upgraded Thumb Throttle Adapter converts twist-grip e-bike throttles into an ergonomic thumb-operated control in under a minute.

Swap a cramped wrist motion for a comfortable thumb press without replacing your original throttle. This adapter fits many popular electric bicycle twist grips — including Rad, Lectric, Pedego, Himiway, and Magicycle — and installs quickly using a stainless steel screw and brass threaded insert for lasting strength. Molded from PETG for improved toughness and outdoor stability, the unit is made to tolerate regular use and weather exposure while still allowing you to return to the original twist-style control when desired.

How does the adapter improve riding comfort?

Using a thumb throttle reduces wrist flexion and grip strain compared with continuous twist throttle use. The Canitu adapter places the control where your thumb naturally rests, so long rides feel less fatiguing and your grip stays relaxed.

• Repositions throttle to a thumb-press for neutral wrist alignment
• Reduces hand cramping and grip tension on longer rides
• Works with existing handlebars and brake lever placement

Which e-bike models and throttle sizes are compatible?

The adapter is built to accommodate multiple popular twist-grip throttles; choose the correct diameter version for a secure fit. It’s noted that earlier Rad models (2017–2019) commonly use ~37mm diameters while many 2020–2021 Rad Runners and similar models use ~41mm—select accordingly.

• Compatible brands: Rad, Lectric, Pedego, Himiway, Magicycle and many electric bikes
• Size guidance: 37mm for some 2017–2019 models, 41mm for many 2020–2021 models
• Quick-fit cinch strap and screw ensure firm attachment

What materials and construction make it reliable?

The adapter is produced by integrated injection molding and uses PETG plastic for a balance of toughness and environmental resistance. Corrosion-resistant stainless steel fasteners and a brass threaded insert add durable mechanical strength where it matters most.

• Housing: PETG for durability and UV/weather stability
• Hardware: 304 stainless steel screw and brass threaded insert
• Manufacture: integrated molding reduces weak points and improves lifespan

How easy is it to install and switch back to the twist grip?

Installation generally takes less than 60 seconds and requires no special tools beyond the included screw. The adapter fastens with a non-slip cinch strap and can be removed or reinstalled quickly so you can revert to the twist throttle whenever you prefer.

• Tool-free or single-screw install in under a minute
• Non-slip cinch strap prevents rotation on the grip
• Design allows quick swap back to original twist-style throttle

Who is this for? Cyclists who want an easier, more comfortable way to control throttle on commuter, cargo, and recreational e-bikes will benefit from Canitu’s adapter. It’s especially helpful for riders who experience wrist fatigue, want a simple aftermarket upgrade without electrical changes, or need a quick solution that fits a range of popular e-bike models.