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 Mutt ST 650b Disc Gravel Bike 2021
The Rondo Mutt ST 650b Disc Gravel Bike is the ideal companion for the longest of adventures across all roads, tracks and paths but can be quickly adapted to become a fast, endurance style road bike.
The Tange Prestige steel frame naturally infuses generous amounts of comfort into the ride to help lower rider fatigue across even the roughest of road surfaces. The frame is partnered by a vibration-damping full carbon fork that offers two axle positions to alter its offset and length to give either more nimble or more composed handling in line with the terrain ahead.
Robust and low-maintenance Rondo 650b wheels team up with broad and plush 47mm all-road WTB tyres to lend a cushioned ride that’s full of traction across loose riding surfaces. 700c wheels with skinnier tyres can also be used in the frameset, giving the ride a fast, endurance road bike theme instead.
Removable mudguards are already installed, and rack mounting points on the frameset mean that vast quantities of luggage can be carried when on the longest expeditions. A Shimano 105 gear setup offers plenty of ratios for any topography, and the matching hydraulic disc brakes stop accurately and reliably in all weather.
Highlights
- A versatile and modern gravel bike designed for the longest of all-road adventures
- Tange Prestige steel frame gives a smooth and comfortable ride and is robust
- TwinTip carbon fork is horizontally stiff but offers tremendous vertical compliance
- TwinTip concept in the fork adjusts the trail to offer either sporty or more composed handling
- Mudguards are already installed and rack mounts are provided for luggage carrying
- Tyre clearance for 650b x 47mm road-plus or 700c x 30mm tyres
- Rondo 650b alloy wheelset is strong and resilient
- Shimano 105 double-chainring gear configuration shifts crisply and provides a vast range of ratios
- Shimano hydraulic disc brakes offer consistent stopping power whatever the conditions
Technical Specification
| Frame | Rondo Muut Tange Prestige Steel |
| Fork | Rondo TwinTip carbon |
| Headset | Rondo - Upper stack |
| Bottom Bracket | FSA, BSA 68mm |
| Stem | Rondo 90mm (S), 100mm (M), 110mm (L), 120mm (XL) |
| Handlebar | Rondo Road 400mm (S), 420mm (M,L), 440mm (XL) |
| Bar Tape | Velo Comfort tape |
| Front Brake | Shimano 105 BR-R7070 hydraulic disc with Shimano SMRT56 160mm rotor |
| Rear Brake | Shimano 105 BR-R7070 hydraulic disc with Shimano SMRT56 160mm rotor |
| Brake Levers | Shimano 105 STR-R7020 |
| Front Derailleur | Shimano 105 FD R7000 |
| Rear Derailleur | Shimano 105 RD R7000, 11-speed |
| Shift Levers | Shimano 105 ST-R7020, 11-speed |
| Chain | Shimano HG701, 11-speed |
| Cassette | Shimano KCS7000, 11-32, 11-speed |
| Crankset | FSA Omega Compact 48/32T, 170mm (S), 172.5mm (M, L), 175mm (XL) |
| Front Wheel | Rim - Rondo Superlight aluminium 622-20, tubeless-ready, 650b / Hub - Rondo Superlight sealed bearings, 100 x 12mm thru-axle, thread 1.5 |
| Rear Wheel | Rim - Rondo Superlight aluminium 622-20, tubeless-ready, 650b / Hub - Rondo Superlight sealed bearings, 142 x 12mm thru-axle, thread 1.75 |
| Front Tyre | WTB Byway, 650b x 47mm, tubeless-ready clincher |
| Rear Tyre | WTB Horizon, 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 | 10.6kg, 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 Mutt ST 650b Disc Gravel 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.