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.
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 Apex 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.
Highlights
- 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 Apex 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
Technical Specification
| 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 |
| Grips | Rondo Grips |
| Front Brake | Shimano BR-RS405 hydraulic disc with Shimano SMRT56 160mm rotor |
| Rear Brake | Shimano BR-RS405 hydraulic disc with Shimano SMRT56 160mm rotor |
| Brake Levers | Shimano BL-RS600 |
| 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 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.
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".