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Rear wheel backing plate

1404 Views 8 Replies 4 Participants Last post by  Scotsman
I was removing my rear wheel this afternoon to replace the knobbie with a new tw4 bridgstone when I discovered a crack near, and through the lug that slides onto the swing arm which holds the brake in position. A new one is available at $80.00. My question is will welding the plate weaken it or make it stronger. Also I wonder if any other forum members have experienced this brakeage. My supposition is that the previous owner replaced the rear sprocket with a smaller one (45) and did not shorten the chain, leaving the rear wheel too far extended leaving the brake too far extended from the lug on the frame causing extreme leverage on the end if the backing plate. Obviously his error was discovered as the chain is proper length now. Glad I discovered the crack before it broke off completely and perhaps locking up the rear wheel. Suggestions appreciated ------Scotsman
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Thanks so much for the reply---- At that price is would seem cheaper to replace than weld --You guys in the forum are the best ! ======

I don't know. I never pass up an opportunity to break out the MIG or TIG.
That's pretty poor quality cast aliminum. I don't envy the guy who has to sew up the crack with the TIG. When I heat them to powdercoat, they release vile out gassing forever. Lots of stuff down in there to get out before you are gonna get a pretty TIG weld.
Yeah, some of those aluminium alloys are pretty strange to weld on - hard to find the right rods and then they just crap out on you anyway. Better to buy a new one compadre.
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