--- product_id: 45213949 title: "Common Bike Left Chain Drive Customized for Geared Bicycle Derailleur" brand: "l-faster" price: "€ 325.87" currency: EUR in_stock: true reviews_count: 13 category: "L Faster" url: https://www.desertcart.sk/products/45213949-common-bike-left-chain-drive-customized-for-geared-bicycle-derailleur store_origin: SK region: Slovakia --- # 250W brush motor power Supports 24V or 36V battery input Customizable clamp-on mount Common Bike Left Chain Drive Customized for Geared Bicycle Derailleur **Brand:** l-faster **Price:** € 325.87 **Availability:** ✅ In Stock ## Summary > 🚴‍♂️ Power up your pedal game — ride smarter, not harder! ## Quick Answers - **What is this?** Common Bike Left Chain Drive Customized for Geared Bicycle Derailleur by l-faster - **How much does it cost?** € 325.87 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/45213949-common-bike-left-chain-drive-customized-for-geared-bicycle-derailleur) ## Best For - l-faster enthusiasts ## Why This Product - Trusted l-faster brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless Pedal Assist:** Boost your ride with a 250W motor that makes uphill climbs and long commutes feel like a breeze. - • **Choose Your Control Style:** Select between twist or thumb throttle to match your riding preference and maximize comfort. - • **Extend Your Range with 36V:** Opt for the 36V kit to enjoy longer rides and enhanced current efficiency for the modern commuter. - • **Lightweight Aluminum Build:** Durable yet lightweight aluminum components keep your bike agile without adding bulk. - • **Tailored Fit for V-Brake Bikes:** Designed specifically for rear-wheel V-brake setups, ensuring seamless compatibility and easy installation. ## Overview The L-faster Common Bike Left Chain Drive Kit is a 250W brush motor electric bike conversion designed exclusively for bikes with rear V-brakes. Featuring a customizable clamp-on aluminum mount and options for twist or thumb throttle, it supports 24V or 36V battery systems (battery sold separately) to enhance your cycling experience with pedal-assist speeds up to 20 km/h. Ideal for professionals seeking eco-friendly, efficient urban mobility without sacrificing style or control. ## Description Product description The kit includes 1. 1x 250W brush motor (with freewheel sprocket) 2. 1x Chain 3. 1x Customized sprocket & components 4. 1x Motor controller (with fuse wire) 5. 1x Mounting plate + bolts 6. 1x Throttle handle/Thumb throttle ​7. Some connectors Note: this kit without battery and battery charger. 250W brush motor Before order (important) 1). This kit is for the bike that using the V brake on the rear wheel. If your bike uses disc brake or coaster brake, this kit does not compatible with that bike, please choose other kits. 2). The motor bracket maybe does not fit your bike frame, this you need to modify the bracket by yourself, please confirm this. If you do not know how to modify, please send me your bike picture, so I can give you suggestion. 3). This kit just for people riding bike easier, it is not fast (26-inch bike can run about 20km/h), you'd better pedal with the motor power, this can ride longer, please understand. 4). The difference between 24V and 36V is the working current, if you want to ride longer, I recommend 36V kit. 5). This kit does not include battery, you need to buy the battery separately, the lead acid battery and the lithium battery are all ok, and the battery capacity I recommend 24V 15Ah or 36V 12Ah. 6). This controller comes with 1 fuse wire and 3 fuses, if you burn 1 fuse, you'd better note what makes it burnt and avoid this happen again, or please feel free to contact me for help. 7). This item has 2 throttle types for choice, if you want the twist type, please choose the "key throttle" option, and if you want the thumb type, please choose the "thumb throttle" option, thank you. Motor controller with Throttle Installation process Review: Great "assist" for someone 70 years old... - I used two 12v 21AH Mighty Max YTX24HL-BS for Arctic Cat Prowler 650 wired in series; they are similar to deep cell marine/RV batteries. The batteries are set in plastic storage containers for adverse weather with charging terminals at the top of each container. Even though the voltage is 24v to the motor, each set of terminals above each battery only shows 12v. I wired in a 20w solar panel for charging a 12v battery with a DPST to select 1 battery at a time. You will also need a DPST switch to turn on the electric feed to the motor with a 20amp in line fuse. I went for a "test" ride; 4 miles round trip; I pedaled often but the motor was a tremendous help. You will not go super fast, but the pedaling was easy, not tiring. Upon return, each battery was at 12.59v when they started around 12.71v. The trip had some minor inclines, but I was not exhausted upon return. The batteries are not light weight; I stayed with the 24v to avoid adding the extra weight of more batteries. I don't mind going medium speed; I needed some exercise & this is better than a treadmill in the home & once I determine my "range of operation" I will be confident while exercising. Great product; AAA+++!!! David C. Review: This is a great bike motor kit - This motor can take off well and reach its top speed without pedaling, works well on up hill too. Very easy to install and only a little time on your part to get it up and ready to use. I am currently using two 12v 7ah battery and now planning to get 2 more batteries and build a battery bike rack to use it for a 15 mile round trip to work. It doesnt make much noise at all compared to the gas motor I had before which I was often stopped by the police because they classified it as a moped. With this electric being quiet, I dont draw much attention in public places. ## Features - Motor Brand:UNITE - 1). This kit is for the bike that using the V brake on the rear wheel. If your bike uses disc brake or coaster brake, this kit does not compatible with that bike, please choose other kits. If you can not sure your bike type, please send me your bike picture, so I can recommend you the correct kit. - 2). The motor bracket maybe does not fit your bike frame, this you need to modify the bracket by yourself, please confirm this. If you do not know how to modify, please send me your bike picture, so I can give you suggestion. - 3). This kit just for people riding bike easier, it is not fast (26-inch bike can run about 20km/h), you'd better pedal with the motor power, this can ride longer, please understand. - 4). The difference between 24V and 36V is the working current, if you want to ride longer, I recommend 36V kit. - 5). This kit does not include battery, you need to buy the battery separately, the lead acid battery and the lithium battery are all ok, and the battery capacity I recommend 24V 15Ah or 36V 12Ah. - 6). This controller comes with 1 fuse wire and 3 fuses, if you burn 1 fuse, you'd better note what makes it burnt and avoid this happen again, or please feel free to contact me for help. - 7). This item has 2 throttle types for choice, if you want the twist type, please choose the "key throttle" option, and if you want the thumb type, please choose the "thumb throttle" option, thank you. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0736S46TF | | Best Sellers Rank | #552,176 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #1,521 in Adult Electric Bicycles | | Brand | L-faster | | Brand Name | L-faster | | Case Material Type | Aluminum | | Color | 24VThumb Kit | | Customer Reviews | 3.9 out of 5 stars 148 Reviews | | Included Components | motor | | Item Weight | 4.05 Kilograms | | Manufacturer | L-faster | | Manufacturer Part Number | YK-B-214 | | Material | Aluminum | | Material Type | Aluminum | | Model Number | 250W | | Mount Type | Clamp-On Mount | | Mounting Type | Clamp-On Mount | | Number of Teeth | 42 | | UPC | 614024375107 | | Unit Count | 1 Count | ## Product Details - **Brand:** L-faster - **Color:** 24VThumb Kit - **Item Weight:** 4.05 Kilograms - **Material:** Aluminum - **Mounting Type:** Clamp-On Mount ## Images ![Common Bike Left Chain Drive Customized for Geared Bicycle Derailleur - Image 1](https://m.media-amazon.com/images/I/61GLxZzo3-L.jpg) ## Available Options This product comes in different **Color** options. ## Questions & Answers **Q: will this motor keep up with traffic on the turnpike ? :)** A: I know your question is just a lark, but if you were to gear things right, you could go way faster than you would think. These things are to assist your pedaling, not to replace you pedaling. If you want to go fast, go get a motorcycle, and join the rest of the gasoline bunch. If you do manage to get on turnpike, with a bike, take a video and put it on YouTube. That would be interesting to watch. **Q: Will this work with the dynacraft alpine eagle 700c 45cm aluminum frame hybrid bike?** A: You can put this on just about anything that rolls. How easy or hard, depends on how you mount the motor. I imagine the price of an aluminum frame bike, would tend to make you NOT WANT to drill many holes though. **Q: I purchased this 36V 250w left chain drive derailleur kit ,,, i received right side clockwise motor. now what ? help.** A: Yes, the motor rotates clockwise, so when you mount it on the bike left side, it can drive the wheel go forward. The right drive kit motor rotates anti-clockwise . You can see this link: https://youtu.be/2dDEep9pu2U **Q: Is there anyone who can provide a real review of just using the parts without mods; what battery to purchase?** A: I've installed 7 bike kits and all bikes are different. This is a universal kit therefore some modification are required. The only kits I've done that don't require modification are the ones that change the entire wheel. Concerning the battery, go with their recommendation or larger. I've never had a problem there, but all of my installs use the motor to assist their pedaling or going up hills. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great "assist" for someone 70 years old... *by D***. on March 14, 2019* I used two 12v 21AH Mighty Max YTX24HL-BS for Arctic Cat Prowler 650 wired in series; they are similar to deep cell marine/RV batteries. The batteries are set in plastic storage containers for adverse weather with charging terminals at the top of each container. Even though the voltage is 24v to the motor, each set of terminals above each battery only shows 12v. I wired in a 20w solar panel for charging a 12v battery with a DPST to select 1 battery at a time. You will also need a DPST switch to turn on the electric feed to the motor with a 20amp in line fuse. I went for a "test" ride; 4 miles round trip; I pedaled often but the motor was a tremendous help. You will not go super fast, but the pedaling was easy, not tiring. Upon return, each battery was at 12.59v when they started around 12.71v. The trip had some minor inclines, but I was not exhausted upon return. The batteries are not light weight; I stayed with the 24v to avoid adding the extra weight of more batteries. I don't mind going medium speed; I needed some exercise & this is better than a treadmill in the home & once I determine my "range of operation" I will be confident while exercising. Great product; AAA+++!!! David C. ### ⭐⭐⭐⭐⭐ This is a great bike motor kit *by M***E on August 6, 2019* This motor can take off well and reach its top speed without pedaling, works well on up hill too. Very easy to install and only a little time on your part to get it up and ready to use. I am currently using two 12v 7ah battery and now planning to get 2 more batteries and build a battery bike rack to use it for a 15 mile round trip to work. It doesnt make much noise at all compared to the gas motor I had before which I was often stopped by the police because they classified it as a moped. With this electric being quiet, I dont draw much attention in public places. ### ⭐ not as advertise *by S***Y on May 24, 2020* weak instructions which is just a sticker on the controller, the bracket does not fit which makes it impossible to truly know cause the description is not really there just fits most bike since I have an old bike frame I hoped that was good enough. the description of volts variety said 24v, 36, but when got box sticker only said 24v. so use one description for all models in the basic bold title is all one really sees . after I ordered i did see in the long description a differents but who knew where the mistake really need to say on both the fine description to the bold on in your face one . i do not know how it works sadly i did hook it up to a battery and never ran so i can only assume it does not work anyways. the business does not allow you to contact for support.. ## Frequently Bought Together - 24V36V250W Electric Conversion Kit for Common Bike Left Chain Drive Customized for Electric Geared Bicycle Derailleur - LotFancy Electric Scooter Charger for Razor E100, E200, E300, E500, PR200, MX350, Dirt Bike, Pocket Mod, Sports Mod, and Dirt Quad, 24V 1.5A Battery Charger, Replacement for W13112099014 - Razor Charger Port - 2 Wire Pocket Mod, Dirt Quad, Dirt Rocket MX350 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sk/products/45213949-common-bike-left-chain-drive-customized-for-geared-bicycle-derailleur](https://www.desertcart.sk/products/45213949-common-bike-left-chain-drive-customized-for-geared-bicycle-derailleur) --- *Product available on Desertcart Slovakia* *Store origin: SK* *Last updated: 2026-08-16*