I have a canyon grail gen 1 and have 42mm tires on the back, which is the recommended max. I just noticed these spots on my back which I assume are from mud scraping against the paint. Is this actual damage or just cosmetic? Can I repair it?
by stucow
20 Comments
I didn’t even need to read the heading to know this was a canyon grail lol. But yes you should be worried if it continues but as of right now you should be fine!
Yes.
That is through the paint, through the base coat and into the carbon.
Definitely a weak spot; might not be that weak, but if it continues to get worse, it’s not good.
The drive side one looks pretty bad. I would have a bike shop or better yet a carbon repair place have a look at it.
I’m a cheapskate, I would put tape and forget about it.
It’s not great looking but most likely you’ll be fine. HOWEVER, the cardinal rule of asking “is this rideable” is go ask your bike shop or a carbon repair shop. The last thing you want is random internet advice causing your bike to fail on you at speed
Just put some tape over it and keep riding
I had similar spots and put two coats of clear fingernail polish on it.
More often than not if you have to ask its probably not safe. However that looks to be a place that is easily repaired. For not alot of money compared to a new frame a repaired could be easily done and yoy wouldn’t have to worry about it anymore.
But I was told that clearance is binary…..
But a mere flesh wound!
Yall need some smaller tires if you don’t want it to get worse. 42 mm labelled is not 42 mm measured…I’d bet your tires are measuring quite a bit bigger than 42
It’s definitely not mud … is your tires rubbing. Check the dish of the tire and its trueness. Go narrower or without as aggressive knobs in order to keep it from getting worse. Whatever you put over that will get eaten through again otherwise
Lmao. I have a Canyon Grail that I just rode through the Hincapie Gran Fondo in Merced, CA in March. The mud was peanut butter on that course and did that to my frame. It’s just paint gone. It’s fine.
Cut some appropriate sized pieces of a soda can up and super glue those suckers on.
I bought a .1mm piece of titanium on eBay to protect my bike on the places that could contact.
I had an aluminum frame snap at the chain stay.
Turns out I had similar marks from running oversized tires and slamming through mud and gravel.
I have a similar issue with my Giant Revolt because I love my cushy 45mm tires.
Recently, I wrapped some protective tape around the spots. My frame is blue, and I used a contrasting color (black) so that I can see when the tape needs replacement.
I have one spot 4 times that size and a few smaller spots.
i have worse on a carbon hardtail. i wouldnt bother. maybe ask your gf for some nailpaint advice and clearcoat it after
Just a rub! I’d stick some heli tape over them, and consider dropping tyre width a fraction. It looks like it’s reached the carbon, so you don’t want it going any further or you will be compromising the frame.
Had a similar issue with my first gravel bike.
For now, you’re good. Looks like it’s just the top layer of paint.
However, mine was caused by the rear bolt not being secure enough and a fair bit of flex/wobble from the tyres.
Ended up costing me £400 to get the carbon repaired by Target Composites here in the UK.
You’ve two choices, ignore it for now and hope it doesn’t get worse or reduce the tyre width and be on the safe side.