This item is no longer available to buy. View similar products.

BMC 257 AL ONE Disc Hybrid Bike

This item is no longer available to buy. View similar products.

Product ID: 1643791

Why buy your bike from Sigma Sports?

sigma sports expert advice
Expert Advice

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.

sigma sports cycle schemes
Cycle to Work Schemes

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.

Bike Delivery Options

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.

laka insurance
Laka Insurance

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 AL ONE Disc Hybrid Bike

BMC's 257 AL ONE Disc Hybrid Bike has clean looks and is highly functional, making it an ideal choice for urban riding and commuting. It pairs a premium aluminium frame with a lightweight carbon fork, and both provide plenty of mounting points for bottles and bags. Tuned Compliance Concept (TCC) Gravel, which includes a D-shape seatpost and Micro Travel Technology, balances vertical compliance and lateral rigidity for a fast yet forgiving ride. Mudguards, the rear one with an integrated rack, are included, as are lights and a kickstand, so you're well prepared for various weather and lighting. 

A reliable Alfine 8-speed groupset with hub gears and a belt drive makes this a low-maintenance, reliable bike, and hydraulic disc brakes ensure you can stop fast when required in wet and dry conditions. The wheels are strong and durable, fitted with grippy, puncture-resistant Pirelli Angel GT tyres in a 37mm width.


  • Lightweight and versatile premium aluminium frame with powder-coated finish for durability
  • Tuned Compliance Concept (TCC) Gravel with a D-shape seatpost and Micro Travel Technology brings vertical compliance and lateral rigidity to the ride
  • Alfine 8-speed hub gears with belt drive
  • Hydraulic disc brakes
  • Mudguards with integrated rack, lights and a kickstand included

Technical Specification

Frame BMC 257 premium aluminium smooth welded, internal cable routing, powder coat finish, flat mount disc, 12x142mm thru-axle
Fork BMC URS carbon with Tuned Compliance Concept (TCC) Gravel, internal brake and hub Dynamo cable routing, mudguard mounts, cargo mounts, side mounts, flat mount disc, 12x100mm thru-axle
Bottom Bracket BSA threaded
Stem BMC-approved MSM01
Handlebar LightSKIN with integrated lights
Front Brake Shimano BR-U300 / RT10 hydraulic disc, 180mm rotor
Rear Brake Shimano BR-U300 / RT10 hydraulic disc, 180mm rotor
Brake Levers Shimano MT200
Shift Levers Shimano Alfine 8 Rapidfire Plus
Chain Belt GATES 120 CDX
Crankset GATES S550 CDX 55T
Front Wheel BMC-approved SR500 rim / CL-712 hub
Rear Wheel BMC-approved SR500 rim / Shimano Alfine 8 hub
Front Tyre Pirelli Angel GT, 700x37c clincher
Rear Tyre Pirelli Angel GT, 700x37c clincher
Saddle Selle Royal Vivo
Seatpost BMC LSP 02
Pedals Available to be purchased separately
Weight Limit (combined weight of bicycle, rider and cargo) 120kg
Accessories Mudguards with integrated rack / lights / kickstand

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 AL ONE Disc Hybrid Bike Sizing

Unable to display Reviews due to Privacy Settings.

Adjust your Cookie Preferences to Opt-in "YES" to "Functional Cookies".

Unable to display Q&A due to Privacy Settings.

Adjust your Cookie Preferences to Opt-in "YES" to "Functional Cookies".

Close menu