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.
All our bikes are fully built by our Cytech qualified mechanics. To find out more, see the Built, Checked, Tuned and Tested section below to see how we'll deliver your bike.
We offer FREE DELIVERY of your bike to your home or place of work. Once you've placed your order, our Customer Care team will be in contact to offer a convenient delivery date of your choice.
We've partnered with Pedalsure to offer you 30-DAYS FREE bike insurance on new bikes over £400. Visit our Cycle Insurance page to learn more and claim.
BMC UnReStricted AL THREE Gravel Bike 2022
The aluminium frame benefits from BMC’s Gravel + geometry that uses an extended wheelbase and slack 70° head tube angle so that the bike is fast and stable off-road, inspiring more confidence when things get rough. WTB’s 45mm wide Riddler tyres also add to the bike’s performance, providing control and grip along with more comfort on longer days out. Bikepacking trips are no problem as the frame is equipped with mounts for rack, top tube bag and mudguards whilst the fork legs have bosses for extra luggage too.
Ever dependable, Shimano’s 10-speed GRX groupset was specifically designed for use on gravel bikes, and combines mountain bike style gear ratios with drop bar shifting, so that any trail or hill can be tackled confidently. Hydraulic disc brakes bring modulation and control to proceedings, ensuring consistent power whatever the conditions for further confidence.
Please note, image is for colour illustration only, exact details are as per the technical specification.
- URS Premium aluminium frame with Gravel+ geometry
- URS Carbon fork
- 10-speed Shimano GRX mechanical groupset
- Shimano GRX hydraulic disc brakes
- BMC PRD23 wheelset with 45mm WTB Riddler tyres
- Mudguard and rack mounts
|Frame||BMC URS Premium aluminium Gravel+ geometry, internal cable routing, mudguard and rack mounts, flat mount disc, 12x142mm thru-axle|
|Fork||BMC URS Carbon, internal brake and hub dynamo cable routing, mudguard and cargo mounts, flat mount disc, 12x100mm thru-axle|
|Bottom Bracket||BMC PF86|
|Handlebar||BMC RAB 03, ergo top shape, compact bend|
|Front Brake||Shimano GRX 400, SM-RT64 rotor 160mm|
|Rear Brake||Shimano GRX 400, SM-RT64 rotor 160mm|
|Brake Levers||Shimano GRX 810 hydraulic|
|Front Derailleur||Shimano GRX 400|
|Rear Derailleur||Shimano GRX 400, 10-speed|
|Shift Levers||Shimano GRX 810, 10-speed|
|Cassette||Shimano Deore 11-36T 10-speed|
|Crankset||Shimano GRX 600, 46/30|
|Front Wheel||BMC PRD23 rim with CL-712 hub|
|Rear Wheel||BMC PRD23 rim with RXC-1425 hub|
|Front Tyre||WTB Riddler, 700x45mm, tubeless-ready|
|Rear Tyre||WTB Riddler, 700x45mm, tubeless-ready|
|Seatpost||BMC RSP 03|
|Pedals||Available to be purchased separately|
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.
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.