Hey everyone
The last few weeks i've been browsing this forum and reading everything I could about hub motors, mid-drives,...
After some consideration, I decided go with the BBSHD on my 29" Merida Big Nine 500 2015 MTB ( bought it new and it's been standing in my garage for 4 years and has been ridden maybe 3 times...).
The problem I have is with the selection of the BB size...Maybe you guys can help me out?
I've read the following articles:
- https://electricbike-blog.com/2015/11/19/get-a-bigger-hammer-bbshdbbs02-installation-problems-fixes-for-non-standard-bb-intrusive-chainstays/
- https://electricbike.com/forum/forum/knowledge-base/motors-and-kits/bbshd/10736-how-to-order-the-right-bbsxx-kit
My BB is 73mm BSA threaded standard (so far so good);
After checking and measuring everything, I think my chainstay will get in the way of the geared hub. I need 68mm clearance for the hub to fit. To get that I need to place a 4/5 mm spacer. Which should leave me with 10 or 11mm of thread depending on the final spacer. (88mm shaft - 73mm BB - 4/5mm spacer = 10/11mm). I've attached some pictures if it might help?
I've read that going for the 100mm version would offset the chain to much so I would love to hear what your thoughts on this are?
Thanks!!
The last few weeks i've been browsing this forum and reading everything I could about hub motors, mid-drives,...
After some consideration, I decided go with the BBSHD on my 29" Merida Big Nine 500 2015 MTB ( bought it new and it's been standing in my garage for 4 years and has been ridden maybe 3 times...).
The problem I have is with the selection of the BB size...Maybe you guys can help me out?
I've read the following articles:
- https://electricbike-blog.com/2015/11/19/get-a-bigger-hammer-bbshdbbs02-installation-problems-fixes-for-non-standard-bb-intrusive-chainstays/
- https://electricbike.com/forum/forum/knowledge-base/motors-and-kits/bbshd/10736-how-to-order-the-right-bbsxx-kit
My BB is 73mm BSA threaded standard (so far so good);
After checking and measuring everything, I think my chainstay will get in the way of the geared hub. I need 68mm clearance for the hub to fit. To get that I need to place a 4/5 mm spacer. Which should leave me with 10 or 11mm of thread depending on the final spacer. (88mm shaft - 73mm BB - 4/5mm spacer = 10/11mm). I've attached some pictures if it might help?
I've read that going for the 100mm version would offset the chain to much so I would love to hear what your thoughts on this are?
Thanks!!