CRC have some e-type UN52s on for a song. I dont need e-type as such, just a 68mm shell (Im assuming axle is the same for a given 113mm spec)

Assuming e-type are designed to have the lip of the drive side cup 2.5mm further away from the BB shell to allow for the e-type mech mounting plate, then can I use an e-type BB with a spacer with no problems?

after a fair bit of googling, I have found someone who had the same idea…and it doesnt look good:

In a typically spendthrift fashion I believed I could just put 2.5mm of spacers onto the UN52E BB to replace the mech mount, but it appears the axle is offset inside the housing (aligned on a 68mm shell), thus the crank spider began to touch the BB shell as I tightened the crank on. I didn’t tighten any further, just took them off; Middleburn recommend 113mm axle for the RS7/8, can anyone confirm that a 68*113mm BB will fit these correctly and get the chainline on target? Which brings me onto the front mech woes…

http://www.retrobike.co.uk/forum/viewtopic.php?p=200638

So will ditch that idea as Im also using middleburn cranks and I know the spider lockring can already get quite close tot he cups as it is.

You can bodge it a bit, I’ve used E-type with ISIS bottom brackets and just bought a BB with a slighter longer axle (118 rather than 113 I think). The cranks are offset by 2.5mm on each side, but it worked fine.

hadnt thought of that. being off centre isnt a bother – good idea though…

EDIT: Bugger. only go up to 113mm anyway 🙁
http://www.chainreactioncycles.com/Models.aspx?ModelID=78147