Potentially stupid question, but is this dent in the side of the chainstay there deliberately to make space for the crankset, or should I be concerned? Frame is a 1993 Marin Bobcat Trail.
by Muttlemun
Potentially stupid question, but is this dent in the side of the chainstay there deliberately to make space for the crankset, or should I be concerned? Frame is a 1993 Marin Bobcat Trail.
by Muttlemun
3 Comments
Yes, that’s deliberate to make space for the crankset, mine has that as wellÂ
File under [crimped chainstays.](https://www.google.com/search?client=firefox-b-lm&sca_esv=853e0add8aad1e86&channel=entpr&sxsrf=AE3TifMnzOI-xul_p6oPHNxdAm7Cy0AUOw:1762261612848&udm=2&fbs=AIIjpHxU7SXXniUZfeShr2fp4giZ1Y6MJ25_tmWITc7uy4KIeioyp3OhN11EY0n5qfq-zEMZldv_eRjZ2XLYc5GnVnME7glWodDcaQwvGYJtospyF4GO5MC0p7Um53mJ2FnRmWzLfvs8MM15EI7IZ9K-WzjfyMSonUBkTYoaEYz_aoCWKu9TQ8dof5M0D_kBJ6KHVqAfl1pdvC4fEdvCuKBOfnDqAXG81w&q=crimped+chainstays+bicycle&sa=X&ved=2ahUKEwjnn72LyNiQAxWjHjQIHTroBM0QtKgLegQIFxAB&biw=1782&bih=837&dpr=1.4)
Totally normal and common. This area of the bike is a tricky part for bike designers. Three things are competing for space: the rear tire, the frame and the crankset. To make space for wider tires, without a ridiculously wide crank setup, they have to look for ways to find millimeters.