Crank rubbing against bike

Quoted post said:

Originally posted by Greg-O
ok.

i got a new crank for christmas. I put it on today, and the inside granny ring is rubbing. also, the outside chainring is rubbing against the chainstay. this is really aggravating me.

it seems as if there is a missing spacer between the BB and the crank.

someone please help. I am so desperate.

You have to match the crankset to the proper spindle length.It would appear you used the old improper BB.

Quoted post said:

Originally posted by boudreaux
You have to match the crankset to the proper spindle length.It would appear you used the old improper BB.

ah [censored]. i ordered the new one to fit this crank from performancebike.com

they said it would fit. grrrrr. i will contact them.

Quoted post said:

Originally posted by Greg-O
ah [censored]. i ordered the new one to fit this crank from performancebike.com

they said it would fit. grrrrr. i will contact them.

I hate Performance. Screwed me on some road pedals. And their customer "service" staff don't seem to know jack about their inventory. Guess this should go in the "my bloody soapbox" category.

Quoted post said:

Originally posted by jmcmillanut
I hate Performance. Screwed me on some road pedals. And their customer "service" staff don't seem to know jack about their inventory. Guess this should go in the "my bloody soapbox" category.

where do you get your parts from?

I don't think performance is at fault. Its not the vendors responsibility to know every single possible BB crank and frame combination there is. Contact your frame maker and ask what the proper spindle size is for the frame.

Quoted post said:

Originally posted by Greg-O
where do you get your parts from?

It's true that you should know what spec. BB your getting before you go installing it, and Performance does carry some quality stuff. However, for parts, I take my business to Nashbar.com. Where Performance carries the latest stuff, Nashbar does the same, plus you can outfit/replace parts on older bikes. For example, you can get a 7-speed cassette (Shimano-compatible) for ~US$10. Also, most of their parts are spec'd on the webpage w/ tech. info and part weight.

Quoted post said:

Originally posted by Hecubus
I don't think performance is at fault. Its not the vendors responsibility to know every single possible BB crank and frame combination there is. Contact your frame maker and ask what the proper spindle size is for the frame.

Well, seattube diameter has a little bit to do with it, but cranks have specific spindle length recommendations. The frame maker could tell hiin nothing other than seattube diameter, threading and shell width.

Quoted post said:

Originally posted by boudreaux
Well, seattube diameter has a little bit to do with it, but cranks have specific spindle length recommendations. The frame maker could tell hiin nothing other than seattube diameter, threading and shell width.

the width of the spindle that i have on the BB is 113. does this mean i need 118?

The BB fits perfectly into the housing, but the spindle does not stick out far enough. so perhaps i just need to move up a size in width.

thanks for all the help you've given me. any additional comments would be greatly appreciated.

Quoted post said:

Originally posted by Greg-O
the width of the spindle that i have on the BB is 113. does this mean i need 118?

The BB fits perfectly into the housing, but the spindle does not stick out far enough. so perhaps i just need to move up a size in width.

thanks for all the help you've given me. any additional comments would be greatly appreciated.

That sounds reasonable.What crank are you using?

Quoted post said:

Originally posted by boudreaux
That sounds reasonable.What crank are you using?

shimano deore LX

Quoted post said:

Originally posted by Greg-O
shimano deore LX

Spindle length choices are listed as 113 or 118. Another thing to check is the BB shell width on the frame. It could be either 68 or 73mm. You have to measure it.

Quoted post said:

Originally posted by boudreaux
Well, seattube diameter has a little bit to do with it, but cranks have specific spindle length recommendations. The frame maker could tell hiin nothing other than seattube diameter, threading and shell width.

Thats why I say its better to contact the manufacturer directly. Their tech support should be able to tell you what combination is required with which crankset. There are so many possibilities that its impossible for a vendor to know them all, especially if its a rare combination or size.

I think I see what part of the problem might be. If you are using one of the new LX cranks they sit much deeper in the BB than the older ones. The new BB has a longer spindle on the drive side to accomodate the cranks. You might have actually been sold the older model BB or you actually need the next largest size. What is the exact model number of the cranks and BB?

The BB is a Shimano BB-ES71 cartridge, and the crank is an M572 Deore LX.

Will i need a special BB with an extra long drive side, but a normal left side for this crank, due to it's odd shape?

Quoted post said:

Originally posted by Hecubus
Thats why I say its better to contact the manufacturer directly. Their tech support should be able to tell you what combination is required with which crankset. There are so many possibilities that its impossible for a vendor to know them all, especially if its a rare combination or size.

I think I see what part of the problem might be. If you are using one of the new LX cranks they sit much deeper in the BB than the older ones. The new BB has a longer spindle on the drive side to accomodate the cranks. You might have actually been sold the older model BB or you actually need the next largest size. What is the exact model number of the cranks and BB?

You are just confusing the issue.His cranks use either a 113 or 118 spindle.If the 113 is too short he needs a 118. BBES71 in either a 68 or 73mm if english and a 70 if Italian thread.........FYI, all octalink lx cranks use either a 113 or 118 spindle. Previous generation LX square taper cranks used 107/113 spindles.We could go back even further till when they used 122, but that's not what were are discussing here.

Quoted post said:

Originally posted by Greg-O
The BB is a Shimano BB-ES71 cartridge, and the crank is an M572 Deore LX.

Will i need a special BB with an extra long drive side, but a normal left side for this crank, due to it's odd shape?

This is not rocket science.Your crank uses BB ES71 in either a 113 or 118 spindle length. Your only other choices are dependent on shell width; 68,70(italian threaad) or 73mm. Measure it.

Quoted post said:

Originally posted by boudreaux
This is not rocket science.Your crank uses BB ES71 in either a 113 or 118 spindle length. Your only other choices are dependent on shell width; 68,70(italian threaad) or 73mm. Measure it.

That is precisely the problem the M572 LX cranks DON'T use a 113mm BB! The ES-71 is for the new 752 XT cranks only! The 572 LX cranks have a much deeper bore than the previous 570 and 571's requiring a longer spindle on both side and particularly the drive side. The 572's REQUIRE the ES-51 BB and no other. These ES-51's come in 121mm or 126mm. That's the problem. He was sold the wrong BB and crank combo. Even the 118mm ES-71 is too short. The crank is hitting the frame long before it bottoms out because the spindle is way too short. Shimano's decided to use specific BB's for each group now. No longer is it like the older splined 750/751, 570/571 cranks which all could use either the ES50 or ES70 BB. Now the 752's require the ES-71 and the 572's require the ES-51. The ES-71 spindle is the same length as the old but it has an offset to the right. In the case of the ES-51 not only does it have an offset but its much longer.

Quoted post said:

Originally posted by Hecubus
That is precisely the problem the M572 LX cranks DON'T use a 113mm BB! The ES-71 is for the new 752 XT cranks only! The 572 LX cranks have a much deeper bore than the previous 570 and 571's requiring a longer spindle on both side and particularly the drive side. The 572's REQUIRE the ES-51 BB and no other. These ES-51's come in 121mm or 126mm. That's the problem. He was sold the wrong BB and crank combo. Even the 118mm ES-71 is too short. The crank is hitting the frame long before it bottoms out because the spindle is way too short. Shimano's decided to use specific BB's for each group now. No longer is it like the older splined 750/751, 570/571 cranks which all could use either the ES50 or ES70 BB. Now the 752's require the ES-71 and the 572's require the ES-51. The ES-71 spindle is the same length as the old but it has an offset to the right. In the case of the ES-51 not only does it have an offset but its much longer.

My apologies. 121 or 126 is correct for the es-51, and lx772.Was reading the wrong line.

Quoted post said:

Originally posted by Greg-O
the width of the spindle that i have on the BB is 113. does this mean i need 118?

The BB fits perfectly into the housing, but the spindle does not stick out far enough. so perhaps i just need to move up a size in width.

thanks for all the help you've given me. any additional comments would be greatly appreciated.

This is the BB you need. Notice the right hand side of the spindle is longer:

thank you thank you thank youuuu 😄

now, for my hopefully last question in this thread.....

if my bike would use a 113 size BB for a normal crank, what size BB-ES51 would it need for an LX?

after that, i think i'm done. thanks a ton you guys 🙂