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.
Cyclescheme can save you up to 39% on a bike and accessories. Visit our Cycle to Work Scheme page to learn more and claim.
Rondo Booz ST Urban 650b Disc Hybrid Bike 2021
With an urban aesthetic, a robust character and a rapid turn of pace, the Rondo Booz ST Urban 650b Disc Hybrid Bike is the ideal partner for commuting to work, running errands across the city or nipping to the café to meet up with friends.
The Cro-Mo frame is robust and resilient and is realised with a sporty geometry to enable it to swerve, duck and dive through the city environment. The full carbon fork is lateral stiff to give an agile response to steering input and features TwinTip technology to allow its offset and length to be altered, making the ride character either more reactive or more stable in line with personal preferences.
Rondo 650b alloy wheels are strong and dependable with the slightly smaller diameter providing additional reactivity for the stop-start nature of urban riding. These wheels are partnered with high volume, 47mm wide tyres for extra comfort over poorly maintained roads.
A SRAM Rival 1 x 11-speed drivetrain shifts impeccably through a wide range of gears and a Shimano hydraulic disc brake setup stops sharply and with control no matter the weather conditions. Flat handlebars complete the build and ensure complete control at all times.
- A hardy, versatile and quick urban cruiser and commuting bike
- Cro-Mo frame is robust and strong for day to day life in the city
- Sporty geometry is tuned for swerving across the city, up curbs and over potholes
- TwinTip carbon fork gives an instant reaction to steering input
- TwinTip concept in the fork adjusts its offset and length to offer either spritely or more composed handling
- Compatible with 700c wheels with up to 30mm wide tyres or 650b wheels with up to 47mm wide tyres
- Rondo 650b wheelset is nimble and reactive, ultra-strong and tubeless-tyre compatible
- SRAM Rival 1 drivetrain shifts with accuracy and dependability through a wide range of gears
- Shimano hydraulic disc brakes stop accurately in any weather conditions
- Flat handlebars give total control at all times
|Frame||Rondo Booz double-butted Cro-Mo|
|Fork||Rondo TwinTip carbon|
|Headset||Rondo - Upper stack|
|Bottom Bracket||FSA, BSA 68mm|
|Stem||Rondo 80mm (S, M), 90mm (L, XL)|
|Handlebar||Rondo Horizon - 660mm|
|Front Brake||Shimano BR405 mechanical disc with Shimano SMRT56 160mm rotor|
|Rear Brake||Shimano BR405 mechanical disc with Shimano SMRT56 160mm rotor|
|Brake Levers||Shimano BL-RS600, mechanical disc|
|Rear Derailleur||SRAM Apex 1, 11-speed|
|Shift Levers||SRAM Apex 1, 1 x 11-speed|
|Chain||SRAM PC1130, 11-speed|
|Cassette||SunRace CSMS7, 11-42, 11-speed|
|Crankset||FSA Omega EXO, 42T, 170mm (S), 172.5mm (M, L), 175mm (XL)|
|Front Wheel||Rim - Rondo aluminium 650b 584-23 tubeless-ready / Hub - Rondo Superlight Sealed Bearings, 100 x 15mm thru-axle, thread 1.5|
|Rear Wheel||Rim - Rondo aluminium 650b 584-23 tubeless-ready / Hub - Rondo Superlight Sealed Bearings|
|Front Tyre||WTB Venture, 650b x 47mm, tubeless-ready clincher|
|Rear Tyre||WTB Venture, 650b x 47mm, tubeless-ready clincher|
|Saddle||Fabric Scoop Flat|
|Seatpost||Rondo, 350mm x 27.2mm diameter|
|Pedals||Available to be purchased separately.|
|Claimed Manufacturers Weight||10.5kg, Size S|
|Please note||Tubeless tape, valve and sealant are not included|
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 specified), 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. We do not install accessories to bikes, including mudguards.
Rondo Booz ST Urban 650b Disc Hybrid Bike 2021 Sizing
Forgotten Your Password?
Please enter your registered email address below and we'll send you an email explaining the next step.
Select a store
Select the store you visit most frequently below and their stock information will show on product pages.