Why buy your bike from Sigma Sports?
Don't hesitate to reach out to us. It's our goal to answer all of your questions and offer the best advice from our experts. We’ll be happy to answer any questions you may have. Contact us now or visit us in-store.
Save up to 47% with any one of our 11 Cycle to Work partners, and get the health benefits of a new bike in exchange for tax free salary sacrifice. To find out more about our various partners and how to apply click here.
Choose between Free Bike Delivery - to your home or place of work - or our new Premier Bike Delivery Service £99.99 and have your bike delivered "ready to ride" and set up to your measurements with seatpost and pedals adjusted on arrival by a qualified bike mechanic. Either way, our Customer Care team will be in touch to arrange a delivery date to suit you.
We've partnered with Laka to offer you 30 days free bike Insurance on your new bike purchase over £400. Click here for more info and find out how to claim.
BMC 257 Urbanchallenge AL FOUR Disc Hybrid Bike 2022
Experience the perfect companion for your daily rides with the 257 Four, where clean aesthetics, meticulous attention to detail, and seamless functionality come together. Boasting a Premium Aluminium frame that is both lightweight and versatile, its powder coating ensures durability for the long haul. Revel in the joy of elegant speed and safety, thanks to the powerful kickstand and premium fenders, complemented by the intuitive Shimano Deore 1x11 single chainring groupset.
Embrace the distinctive Swiss Design of the 257, standing out with a minimalist yet iconic flair. The bike's durability is anchored in the use of Premium Aluminium and Powder Coating, ensuring superior longevity. Functionality takes center stage with premium fenders and an integrated rear carrier, seamlessly blending style and utility. The addition of kickstands enhances daily usability, making the 257 Four your go-to choice.
Simplicity reigns with the single chainring drivetrain featuring an 11-speed cassette, delivering the essential gearing range in a clean, lightweight, and user-friendly package. Elevate your riding experience with the 257 Four – where style meets durability and functionality in every pedal stroke.
Technical Specification
| Frame | 257 Premium Aluminium Smoothwelded, Staggered Top Tube, Powder Coat Finish, Internal Cable Routing, BSA Threaded Bottom, Bracket, Flat Mount Disc, 12x142mm Thru-Axle |
| Fork | 257 Premium Aluminium, Fender Mounts, Flat Mount Disc, 12x100mm Thru-Axle |
| Gears | 1x11 |
| Chainwheel | FSA Vero Pro 40T |
| Cassette | SHIMANO Deore 11 spd 11-42T |
| Chain | SHIMANO Deore 11 spd |
| Rear Derailleur | SHIMANO Deore 11 spd |
| Shifters | SHIMANO Deore Rapidfire Plus |
| Brakes | SHIMANO MT200/RT10 Rotors (160/160) |
| Handlebar | BMC LSB 03 |
| Stem | BMC RSM01 |
| Seatpost | BMC LSP 02 |
| Saddle | Selle Royal Vivo |
| Hubs | CL-712 / RXC-142S |
| Rims | PFR300 |
| Tires | Pirelli Angel GT - 37mm |
| Tire Clearance | 42mm (Measured Width) |
| Extras | Fenders with Integrated Rack, Lights and Kickstand |
| Weight Limit | 120 Kg |
Built, Checked, Tuned and Tested
All our bikes are fully built, checked, tuned and tested by our Cytech qualified mechanics and then securely packaged, ready for delivery. All you have to do is add the pedals (if included), attach the handlebars to the stem and tighten them following the included detailed instructions or by watching our video and using the provided FREE tools. Visit our Bike Assembly page to see how you assemble your new bike once you receive it.
All bikes collected from our shop, are built, tested and ready to ride. For hassle-free home delivery and bike set-up from a qualified mechanic use our Premier Delivery Service.
Please note, occasionally, manufacturers may change the specification without notice. Bicycles do not come with pedals unless otherwise specified. Bikes ordered for delivery will not arrive with the pedals installed, please refer to the owners manual and pedal installation guides provided for guidance. We do not install accessories to bikes, including mudguards. Bikes ordered for delivery that have tubeless compatible tyres and rims will arrive with inner tubes installed or with tubeless valves installed, this will be brand dependent. Sealant is available to be purchased separately.
If you require any assistance please contact our Customer Care team.
BMC 257 Urbanchallenge AL FOUR Disc Hybrid Bike 2022 Sizing
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