I'm looking on SVRacingParts.com for a new chain and sprockets. They sell the front/rear sprockets and a 525 chain for $180, and the front/rear sprockets with a 520 chain for $220.
Why is the 520 chain more expensive? I read the 520 is weaker than the 525 is (525 being wider).
Is that just because nobody buys those or something? Maybe the sprockets are narrower? or the chain/sprocket combo is lighter? What other reasons could there be?