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The Comas R3 20" 2026 is a 20-inch trials bike designed for riders looking to get started in trials and continue developing their skills. It combines a 6061 T-6 aluminium frame and fork with a carefully selected range of components suitable for training and improving riding technique.
Available in two versions, Pro and Factory, both sharing the same frame, geometry and main components. The main difference is the braking system: the Pro version features Shimano BL-MT200 disc brakes, while the Factory version comes equipped with black Hope Evo Trial Zone brakes and Comas rim decals.
Key features include the 12 mm rear through axle, the Comas front freewheel with 108 engagement points and the ISIS crankset. Due to its dimensions, this bike is recommended for riders approximately 160 cm tall or above.
The Comas R3 20" 2026 is available in two configurations. Both share the same technical specifications and geometry, with differences in the braking system and rim graphics.
| Feature | Pro Version | Factory Version |
| Brakes | Shimano BL-MT200 | Hope Evo Trial Zone, black |
| Brake Rotors | Comas 160 mm | Comas 160 mm |
| Rim Graphics | Without Comas stickers | With Comas stickers |
Important: Select the Pro or Factory version from the product options before adding the bike to your cart.
| Frame and Fork | Comas 6061 T-6 aluminium, with tapered 1 1/8"–1.5" head tube. |
| Rear Axle | 12 mm through axle with 116 mm rear hub spacing. |
| Brakes | Pro: Shimano BL-MT200. Factory: Hope Evo Trial Zone, black. Both versions with 160 mm Comas brake rotors. |
| Front Freewheel | Comas, 18 teeth and 108 engagement points. |
| Cranks and Bottom Bracket | 160 mm Comas ISIS 7075 cranks and 123 mm Comas ISIS bottom bracket. |
| Wheels | 20" front rim, 19" rear rim and Clean Koala tyres. Factory version with Comas rim stickers. |
| Wheelbase | 1008 mm. |
| Recommended Rider Height | Approximately 160 cm and above. |
| Weight | Pro version: 8.64 kg. Verified by TrialBikes! |
The Comas R3 frame is manufactured from 6061 T-6 aluminium and features a 12 mm rear through axle. It is paired with a 116 mm wide Comas Entry Disc rear hub and a Comas Entry 20" aluminium fork.
The Pro version is equipped with Shimano BL-MT200 disc brakes, front and rear. The Factory version features black Hope Evo Trial Zone brakes, offering a higher-end braking option within the Comas R3 range.
Both configurations use 160 mm Comas brake rotors and feature Post Mount brake mounts on the frame and fork.
The drivetrain features a Comas front freewheel with 18 teeth and 108 engagement points, a 12-tooth fixed rear sprocket and 160 mm Comas ISIS 7075 cranks. The Comas ISIS bottom bracket has a length of 123 mm.
The bike features a 20" front rim and a 19" rear rim, fitted with Clean Koala 20" × 2.00" and 19" × 2.60" tyres. The Factory version includes Comas decals on both rims. The cockpit features a Comas 7075 riser handlebar, 720 mm wide with 105 mm rise.
The Comas R3 20" 2026 is recommended for riders looking for a 20-inch trials bike to get started, train and improve their skills. It is also a suitable option for riders looking for a mid-range build with an aluminium frame, front and rear disc brakes and a rear through axle. The Pro version features Shimano brakes, while the Factory version is designed for riders who prefer Hope Evo Trial Zone brakes.
| Frame | Comas R3 20", 6061 T-6 aluminium, tapered 1 1/8"–1.5" head tube, 12 mm through axle and Post Mount disc brake mount. Silver finish. |
| Fork | Comas Entry 20", 6061 T-6 aluminium, tapered 1 1/8"–1.5" steerer tube and Post Mount disc brake mount. |
| Front Hub | Comas Entry Disc, 28 spokes, 100 mm spacing and 10 mm axle diameter. |
| Rear Hub | Comas Entry Disc, 32 spokes, 116 mm spacing and 12 mm through axle. |
| Chain Tensioner | Comas Race, with two 10-tooth plastic jockey wheels, black. |
| Front Rim | Comas 20", 32 mm wide, 28 holes, black. Factory: with Comas decals. |
| Rear Rim | Comas 19", 48 mm wide, 32 holes, black. Factory: with Comas decals. |
| Spoke Nipples | 15G aluminium spoke nipples, black. |
| Rim Tape | Comas, black. |
| Front Inner Tube | Comas 20" × 1.75", 0.8 mm wall thickness. |
| Rear Inner Tube | Comas 20" × 1.75", 0.8 mm wall thickness. |
| Front Tyre | Clean Koala 20" × 2.00". |
| Rear Tyre | Clean Koala 19" × 2.60". |
| Front Brake | Pro: Shimano BL-MT200 disc brake. Factory: Hope Evo Trial Zone disc brake, black. |
| Rear Brake | Pro: Shimano BL-MT200 disc brake. Factory: Hope Evo Trial Zone disc brake, black. |
| Brake Rotors | Comas 160 mm, on both versions. |
| Disc Guard | Not included. |
| Cranks | Comas ISIS 7075, 160 mm length, black. |
| Bottom Bracket | Comas ISIS bottom bracket, 123 mm. |
| Front Freewheel | Comas, 18 teeth and 108 engagement points. |
| Rear Sprocket | Comas 7075 CNC fixed sprocket, 12 teeth. |
| Chain | KMC Z1 1/2" × 3/32", silver finish. |
| Pedals | Comas 7075, black. |
| Headset | Comas tapered headset, 1 1/8"–1.5". |
| Stem | Comas 3D 20°, 150 mm length and 20° angle. |
| Stem Top Cap | Comas, black finish. |
| Handlebar | Comas 7075 riser handlebar, 105 mm rise and 720 mm width. |
| Grips | Comas foam grips, 4 mm thickness, black. |
* Measurements taken with a 370 mm fork and +40 mm offset. Same geometry for both Pro and Factory versions.
| 1) Wheelbase | 1008 mm |
| 2) Chainstay Length | 350 mm |
| 3) BB Rise | +85 mm |
| 4) Head Angle | 72° |
| 5) BB to Top Centre of Head Tube | 601 mm |
| 6) Reach | 482 mm |
| 7) Stack | 359 mm |
The main difference is the braking system. The Pro version uses Shimano BL-MT200 brakes, while the Factory version features black Hope Evo Trial Zone brakes. The Factory also includes Comas rim decals. Both versions share the same frame, geometry and other main components.
It is recommended for riders looking to get started in trials and continue improving their skills on a 20-inch bike. Due to its dimensions, it is suitable for riders approximately 160 cm tall or above.
Yes. Both the Comas R3 frame and the Comas Entry 20" fork are manufactured from 6061 T-6 aluminium.
Yes. The rear wheel uses a 12 mm through axle with a 116 mm wide hub. The front hub has a width of 100 mm and a 10 mm axle.
The Comas freewheel, with 18 teeth and 108 engagement points, is positioned at the front of the drivetrain. The rear wheel uses a 12-tooth Comas fixed sprocket.
It features a 123 mm Comas ISIS bottom bracket and 160 mm Comas ISIS 7075 cranks.
This depends on the selected version. The Pro comes with Shimano BL-MT200 disc brakes, while the Factory features black Hope Evo Trial Zone brakes. Both versions use 160 mm Comas brake rotors, front and rear. The disc guard is not included.
The bike is delivered partially assembled and checked. The customer will need to install both wheels, the chain and pedals, and fit the handlebar and stem assembly.
Yes, depending on compatibility and availability. Contact TrialBikes before placing your order to enquire about possible component changes and price differences.
The Comas R3 20" Pro weighs 8.64 kg (verified by TrialBikes).
The bike is delivered partially assembled and checked. The customer will need to install both wheels, the chain and pedals, and fit the handlebar and stem assembly.
Since 2008, we have been shipping Trials and Bike Trials bikes to countries around the world. We have prepared and shipped hundreds of bikes, including to international destinations, and know how to protect them during transport.
Component specifications may be subject to change depending on manufacturer availability. Any changes will be communicated to the customer before delivery. Replacement components will always be of equivalent or higher quality.
Tell us your height, age, riding level and current bike. We will help you check whether the Comas R3 20" 2026 geometry is suitable for you and choose between the Pro and Factory versions.
CONTACT TRIALBIKES| FRONT BRAKE | Disc |
| REAR BRAKE | Disc |
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