will this new chainwheel fit or will i need to change ?

[bollo]

i have a 2012 Merida Scultura Evo 905 currently running FSA Energy 50-34 BB30 will the Shimano Ultegra 6750 Hollowtech II Compact chainwheel fit ? if not what do i need to change ?

[bollo]

ok did some searching & turns out i will need a Shamano bottom bracket , i got one with my bike when i bought it (new) from the shop he mentioned if i ever changed the cranks to non BB30 i would need so i will have to dig it out

[Duck!]

Shimano bottom brackets are not compatible with BB30 frames. You'll have to hunt around for an adaptor set to convert BB30 to BB86 or BB90.

EDIT: My mistake, that should be BB92, not BB90 (that's MTB press-fit).

[bollo]

hmm i got a bracket with the bike that has 86 on it is that what you mean ?

[biker jk]

Shimano bottom brackets are not compatible with BB30 frames. You'll have to hunt around for an adaptor set to convert BB30 to BB86 or BB90.

Doesn't he need a BB30 to Hollowtech II adapter such as those in the link below?

http://wheelsmfg.com/products/bottom-br ... pters.html

[bollo]

this is what i got with the bike

[Duck!]

Er... that says 68, not 86 (68 being the width of a BB30 or conventional screw-in bottom bracket) Got another pic of that thing, from a different angle? I'm not too sure how that would lock in securely enough to fit a screw-in BB.

Shimano bottom brackets are not compatible with BB30 frames. You'll have to hunt around for an adaptor set to convert BB30 to BB86 or BB90.

Doesn't he need a BB30 to Hollowtech II adapter such as those in the link below?

http://wheelsmfg.com/products/bottom-br ... pters.html

That's precisely what I was thinking of.

Incidentally, BB86 has a 86mm wide shell, into which press-fit bearing cartridges are fitted. BB92 (my bad, BB90 is different again.... ), like BB30 has the bearings pressed directly into the frame without housings. In both cases the resulting BB width is the same as a screw-in external cartridge BB.

[bollo]

here are some other angles





hope this helps id it

[Duck!]

I haven't seen exactly that thing before, but I have seen complete BB cartridges on a similar principle (for fitting into frames where the thread has been stripped).

I'm guessing it's in two parts that thread together; in which case, you'd separate them, insert them into either side of the frame (there's a specific way for it to go - one side will have a reverse thread for the BB, this goes in the right [drive] side of the frame) & screw them together. Then fit the screw-in Shimano BB.

[bollo]

it's a 1 piece with a tapered washer on 1 end & the 2 center washers

[Duck!]

Righto. I suggest paying a visit to your friendly Merida dealer for more info, 'cos it's got me stumped as to how it could be fitted securely enough to screw a BB into it.

[Mulger bill]

Is that tapered section on the left with the big chunk out of it removeable?

[bollo]

just checked defiantly 1 piece i'll go see the guys at Blackmans tomorrow , cheers for all the helps guys

[bollo]

ok with more searching i found this old thread viewtopic.php?f=9&t=35177" onclick="window.open(this.href);return false; so seams this is not an old issue & is easily sorted