Anyone have a Schwinn Sweetspot Carbon crack?
I was just cleaning my Homegrown Carbon Sweetspot and have found what I think are two cracks in the carbon frame.
Has anyone ever had one of these frames crack? Mine appears to be cracking near the head tube area, on the bottom, right where the cable bosses are. I have a "spare" frame, but I'm still kinda sad that this might be the end of it.
Last edited by CTB; 04-22-2009 at 04:40 PM.
Do you happen to have a double crown fork on it? If you do that could be putting too much stress on the head tube area.
Nope, I have a 100mm SID from 1999 on it, which is a fork Schwinn sold the bike with in All Mountain form, IIRC. They might have even put a double crown on it - I know some of the All Mountain ones had DC's on them.
I haven't yet been able to determine if the frame is really cracking, or if it is just the cable stay splitting from the rest of the frame. If Schwinn attached the cable stays later (certainly possible given the manufacturing techniques you'd use to make a carbon front triangle like this), perhaps I'm just losing the cable stay. Which would be a much smaller deal than losing the frame. Time will tell...
My friend has a Homegrown Sweet Spot carbon frame which has "cracks" which look like yours, and they turned out to be nothing but the paint cracking on top of the carbon. It sounds weird, but the carbon is pliable enough that it will flex underneath the paint.
I'm not too worried about the carbon front ends after seeing what he's put his through. He's 220 pounds, and has take it downhill and urban (a lot) aside from the standard cross country.
Thanks, Bad Mechanic! I couldn't tell on mine how deep these cracks go, but I'm way lighter than 220, so hopefully these are just paint cracks, too. This gives me more confidence to take it out sometime and try it to see if the cracks progress any.
If you're worried, use a new razor blade to chip the paint right on top of the crack and inspect the material underneath for any fractures. If you're good, you can just touch it back up with a bit of white paint.