- Excellent value 20" wheel trials bike from Onza, ideal for beginner or fast learning riders.
- High grade 7005-T6 aluminium frame with rear disc mount and head tube reinforcing gussets.
- Tough Onza cromoly forks with disc brake mount.
- New for 2013, the Pro is fitted with the great Avid BB5 cable pull disc brakes fitted with lightweight rotors - a great feature on a bike at this price.
- Onza single wall front rim and double wall rear rim, drilled to reduce weight, 20" front and 19" rear.
- Onza's updated Sticky Fingers 2 tyres, 20 x 2.0" front and a large volume 19 x 2.5" rear.
- T-Pro crankset fitted with light weight bashring and 18T freewheel for maximum pedalling response.
- Bash/ski-plate fitted as standard.
- Onza cromo riser 31.8mm trials handlebar.
- Onza alloy 31.8mm stem to reduce weight.
- New Onza caged pedals.
- 12T screw on sprocket on the rear hub, giving a traditional 18-12 gear ratio.
- Seatless design to reduce weight and increase stand over clearance.
- Updated for 2013, the Pro is finished with a stealthy matte black paint job with silver accents and graphics.
- Weight: 11.16kg
Geometry (to be confirmed)
Wheelbase: 1010mm
Chainstay Length: 350mm
BB Rise: 70mm
Free Items with this Bike! (Subject to stock availability)
As riders ourselves, we know exactly how to improve standard build bikes to ensure the best possible enjoyment for the rider. Instead of cutting prices, we spend extra time setting the bikes up to a high standard (which takes almost an hour per bike), and we also include the following items free of charge:
TartyBikes T-Shirt: We have Extra Small, Small, Medium, Large and Extra Large available (Men's sizes) in varying colours, click the link to see what we currently have available. Please ensure you specify which size T-Shirt you would like - it's unlikely our guess will be correct!
TartyBikes Chainstay Protector: Nifty little device to protect the paintwork on your frame when the chain slaps against it. One logo on each side... choose whichever you prefer!
TartyBikes MultiTool: What better to help tweak and set up your bike than a designed-for-purpose multitool?
You'll also receive some free TartyBikes stickers to use wherever you like!
Please ensure all the details on the warranty sheet supplied with the bike are adhered to. Certain circumstances (such as stripped threads or rounded crank arm tapers) only occur due to a lack of correct maintenance and all manufacturers are aware of these situations, so any claims due to incorrect maintenance procedures are much less likely to be successful.

Average Rating (Based on 3 customer ratings)
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First Trials Bike

Posted by Dan on 16/04/2012
Great bike!!!

Posted by Dustin on 24/11/2012
GREAT!

Posted by Tom on 11/03/2013
Have a question regarding this product? Then be sure to look through other customer's questions and answers below. If you require any further information, feel free to get in touch.
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I received my Onza Pro today in good time and in good condition. Had a quick ride on it during my dinner up and over a few empty pallets, just to get the feel of it. I am relatively new to trials, but as hard and it was earlier, I had an absolute blast.
Reply from TartyBikes on 17/04/2012
Hi Dan - It's good to hear you're getting on well with the bike. Trials can be quite a hard sport to get in to, but if you stick with it you'll find it very rewarding. Thanks for the review!