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Your cart is empty.The OneUp Underbash Guard mounts to our mountain bike's ISCG-05 tabs and protects our chainring and bike frame from impact damage. It's designed for frames with a 2-bolt ISCG-05 mount such as Evil and Rocky Mountain. If your frame has a 3-bolt ISCG-05 mount, OneUp recommends contacting your frame manufacturer to see if it's compatible.
Joe Bauer
Reviewed in the United States on February 14, 2025
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Len Novak
Reviewed in the United States on August 9, 2024
Added to both of my kids trail bike for park season. Both kids have bashed them on rocks. Both skids are holding up well. Even if they flake one, I will gladly order a replacement skid from the company I trust.
N. Hollins
Reviewed in the United States on December 13, 2024
I have to say for the money this is a nice bash guard. I put it on my Yamaha moro 07 in 10 minutes. All the instructions were there. I did have to remove the chain guide but that is what narrow wide chain rings do. I feel 100% Better knowing it's down there and if you manage to wear your size guard a replacement is very reasonable. If you have a frame that will allow you to run one do it! A bent chain ring can make it a lot of pushing.
rich b
Reviewed in Canada on November 2, 2024
It works. I had one bike without a bash guard and broke a chain. Its on and slides much better over rocks.
Christopherguth
Reviewed in the United States on May 3, 2023
perfect for my 28T chainring. Other size guards included it I want to bump up the ring size.
Andrew
Reviewed in the United States on March 25, 2023
Seems fine, haven't had a chance to go ride and see if I bang out on any rocks (I'll have to remember to update this in the future if anything goes south with this). Only complaint is the bolts are about 10mm long it looks like, and my Polygon T8 has a single threaded hole not drilled all the way through, so the max bolt length it can take is probably 5-6mm. I went to home depot and bought a similar bolt and Dremel'd and filed it down to about 5mm and it worked fine after that.So be warned, went to my LBS and they had no shorter M6 hex bolts for that spot. Might just be my specific bike though.
sean leeson
Reviewed in the United States on November 23, 2023
Easy ISCG 05 mounting and comes with different size sliders for various chainring sizes and no need to remove crank arms. Haven't hit anything yet but knowing I have a quality bash guard is great piece of mind.
Johnny P
Reviewed in the United States on January 1, 2023
Very nice part. I have several components from OneUp. This is the same high quality. It attached very easily to my Treks ISCG mounting bosses and it looks great. i am hoping not to test its protection by not slamming it into rocks and logs. This is another smash hit from OneUp no pun intended).
Customer
Reviewed in the United States on December 6, 2022
The install process of this was super simple. You can make it easy by removing the crank, but if you’re lazy you can also manage. As a relatively intermediate level rider, I know the danger and annoyances of breaking a chain ring into a rock etc. i think this product is a great addition to get you home safely and being able to ride out of the trail. It comes with a few replacements as well, and additional replacements can be purchased online.
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