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 THREE Disc Hybrid Bike
Looking for a reliable and stylish urban partner for your daily rides? Look no further than the 257 THREE bike. With its attention to detail and functional integration, this bike is the perfect choice for city commuters.
One of the standout features of the 257 THREE is its premium aluminum frame. Lightweight and versatile, this frame is powder coated for added durability. And with its powerful kickstand, premium fenders, and integrated rear carrier, this bike is both stylish and functional.
But that's not all - the 257 THREE also features a reliable Shimano Nexus 8 beltdrive groupset, which provides a smooth and joyful ride. And thanks to its belt drivetrain and integrated gear hub, this bike is low-maintenance and highly durable. Even in wet weather and harsh conditions, you can count on the 257 THREE to keep you moving.
Of course, style is also important, and the 257 THREE delivers in spades with its minimalist yet iconic Swiss Design. So if you're looking for a bike that can keep up with your daily routine and turn heads at the same time, the 257 THREE is the perfect choice.
Technical Specification
| Frame | BMC 257 Premium Aluminium Smoothwelded, powder coat finish, internal cable routing, BSA threaded bottom bracket, flat mount disc, 12x142mm thru-axle |
| Fork | BMC 257 Premium Aluminium, mudguard mounts, flat mount disc, 12x100mm thru-axle |
| Stem | BMC RSM01 |
| Handlebar | BMC LSB 03 |
| Front Brake | Shimano BR-U300 / Shimano RT10 180mm rotors |
| Rear Brake | Shimano BR-U300 / Shimano RT10 180mm rotors |
| Brake Levers | Shimano MT200 |
| Rear Derailleur | Shimano Alfine, 8-speed |
| Shift Levers | Shimano Alfine SL-S7000, Rapidfire Plus 8-speed |
| Chain | Belt GATES 120 CDX |
| Cassette | GATES SUREFIT 3-LOBE UNIFIED CDX2 4T |
| Crankset | GATES S150 CDN 55T |
| Front Wheel | PFR300 rim / CL-712 hub |
| Rear Wheel | PFR300 rim / Shimano Nexus 8 |
| Front Tyre | Pirelli Angel GT - 37mm, clincher |
| Rear Tyre | Pirelli Angel GT - 37mm, clincher |
| Saddle | Selle Royal Vivo |
| Seatpost | BMC LSP 02 |
| Pedals | Available to be purchased separately |
| Weight Limit | 120kg |
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 THREE Disc Hybrid Bike Sizing
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