shoota 

Story is I can get this 2011 Scott CR1 Pro frameset for $100 from a guy that rode this for a couple years without even knowing the crack was there. He's quite a bit heavier than me and the crack is about 1cm long on the seat tube by the bottle bosses. I really want to ride this frame. So the question is, what should I do? Ride it and see how I like it and hope to get my $100 back out of it if I don't? Ride it and if I love it get it fixed? I don't think it will disintegrate under me or anything..hmm..decisions..

CliffordK

That is Carbon, right?

There would be a little extra stress on the side of the seat tube vs the front.

If it was me, I'd probably buy the frame, but expect to sand out the damaged spot and add some Carbon Fiber cloth + epoxy, and still remain with a slight bulge. Some people consider CF to be very repairable.

Oh, also, what type of rear derailleur hanger does your Scott have? You might double check the hanger and hanger alignment before making the purchase.

shoota 

It's just your standard alloy replaceable hangar. How do I check if it's straight?

chriskmurray

I would probably send it to somewhere like Calfee to repair it and then put many thousands of trouble free miles on it once you get it back!

cale

Don't buy good deals. Especially is there's a problem. Which it looks like there is. Don't your Benjamin's want to get you a frame that you don't need to repair before your first ride?

shoota 

I'm guessing that will cost more than it's worth.

That's the thing though, I don't think it needs to be fixed before my first ride.

cale

I'm not sure which is worse. The fact you believe that it is rideable or that you think that it is a good deal because it could be rideable. Haha

chriskmurray

You would be surprised actually. These guys start at $200 for minor repair which I guess yours would be. So for not a lot of money you have a pretty nice frame you do not have to worry about. Pricing « Carbon Fiber Bike Frame Repair

CliffordK

As long as it is replaceable, that is probably ok. You can check the alignment during the build.

There were several Scott frames made without replaceable hangers that inevitably got destroyed.

cale

Dengfu. Starting at $500. Fm029 reviewed here BikeRadar.com ? View topic - Dengfu fm029 isp

CliffordK

Godzilla carbonworksTM Carbon fiber composites repair kit - $49.00 & FREE Shipping

Ok, so I like tinkering on things (not all gets finished). I have been tempted to track down a CF bike with a badly broken TT, but so far have resisted the temptation.

The Scott, with the small chip in the seat tube sounds like a good one to play around with.

If the OP passes on it, I might even consider making a bid on it.

shoota 

See? I'm not the only one that thinks this is a good deal. I'll look into that repair kit, I like tinkering too.

shoota 

Is that product intended to be a cosmetic or structural repair?

CliffordK

I'm seeing some vinyl and decal kits that would be considered "cosmetic".

But, that Godzilla kit, and this marine kit for even less appear to be "structural".

Real Carbon Fiber Epoxy Resin Kit - 2x2 Twill 36" x 6" - $24.99 & FREE Shipping

Although, it should also give you a good cosmetic effect with the right application.

My Scott frame has an extremely open weave for the outer layer that would be difficult to get a good match.

I haven't done CF repair yet, although there are other topics on the board where members have done so with great success. Your frame appears to have minimal damage in an accessible location. I'd go for it. If you don't, send me the info on the seller. It would be fun.

CliffordK

https://www.bikeforums.net/general-cy...ixed-home.html

I will say that I'm not sure the Scott is a super high-end frame, so you won't have the envy of the neighborhood when done, but it will still be a good project.

shoota 

It's definitely not a super high end frame but it isn't a crap one either. They can be had on eBay for ~$450-500. So for $100 and a $25 kit I think it's worth a shot.

Up North

As for fixing it, not a big deal. Just practice the patch on another piece of pipe etc so you see how much time you have and how the cloth handles. I'd sand and then cover area with resin first. Once that is dry then add a patch 3-4 inches high that goes all the way around the tube over the damaged area. This will strengthen area and you should have no further issues.

This repair will not be the same diameter as the rest of the tube. If you can live with this then it is a quick fix - put a decal over repair job and forget about it. If you want it to look like new then don't attempt it on your own, pay the pro's but as already stated your into $$$ for that route.

spdracr39

Personally I would have to pass because every time I rode it I would be thinking about that crack instead of enjoying the ride.

shoota 

I think this is the route I will go. I'm into riding it more than it looking good (which it already doesn't anyways)

Even if I left the crack I don't think I would be overly concerned about it. With it fixed I really don't think I'll be concerned about it. At bare minimum it's a cheap fun project that I think will turn out well.

rmfnla

CF has multiple layers so even if that crack did spread it would not do so catastrophically.

If the frame is one you truly want I'd go for it...

shoota 

Yep, I had the lbs owner look at it and he said if you're good with fixing it then yeah it should be ok. I'm gonna do it.

unterhausen

I don't think that's really a crack, at least not in the sense that we use the term regarding metallic structures. However, it may be evidence that there is considerable damage underneath. You can use the "nickle test" to see if it is delaminated underneath

cale

Bend a fork!

shoota 

Are you crazy?!? I don't have a death wish man!

shoota 

Nickel test == dead sound when tapping on it?