Campagnolo Ultra Torque Titanium bb bolts

Discuss light weight issues concerning road bikes & parts.
User avatar
tommasini
Posts: 1297
Joined: Sun Nov 02, 2003 6:48 am
Location: Central USA
Contact:

by tommasini

This ebay seller just reassured me that these bolts are for UT cranksets - due to the limited description if you have any doubts (as I did - especially since there are 2 offered when the crank only needs 1....) then please email him before taking my word for validity of the item (I bought 4.......hope they are as he described via emails......)

I do find the claimed weight savings to be suspect too - I'd guess about 8 - 10 grams per bolt (and only one used...) - but still a few grams saved is a few grams saved!!!!!!!!!!!!!!!!

http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... K:MEWAX:IT

User avatar
tochnics
Posts: 1155
Joined: Mon Apr 30, 2007 11:02 pm
Location: around amsterdam

by tochnics

they are bolts for a isis bottom bracket
ive got some but havent tried them yet


strangly i havent quite worked out of the spacer is Ti to
its lighter then stainles steel so thats good enough for me
Join the light side

a light bike does make you go faster unless you are slow

User avatar
Juanmoretime
Administrator
Posts: 7063
Joined: Sat Jun 19, 2004 11:08 am
Location: Urbana, Illinois

by Juanmoretime

Looks like a 5mm hex key. With the stock Campy being 10mm I'm might be concerned about rounding it out since that bolt does have a pretty high torque specification.

BTW, if it works please post up.
RESIDENT GRUMPY OLD MAN.

jmartpr
Shop Owner
Posts: 998
Joined: Thu Apr 17, 2008 1:07 am
Location: San Juan, Puerto Rico
Contact:

by jmartpr

I have been runing ISIS M15 Ti bolts on my Ultra Torque for quite some time now.....no issues and you save some weight. make sure the bolt is M15 so you can use a bigger allen key to torque down.

rustychain
Posts: 3915
Joined: Tue Jun 22, 2004 11:42 pm
Location: lat 38.9677 lon 77.3366
Contact:

by rustychain

Best to torque it with the steel bolt and then replace it with the ti. Don't forget the ti lube as it will freeze without it :beerchug:
WW Velocipedist Gargantuan

DaveS
Posts: 2529
Joined: Fri Mar 24, 2006 1:26 pm

by DaveS

rustychain wrote:Best to torque it with the steel bolt and then replace it with the ti. Don't forget the ti lube as it will freeze without it :beerchug:


That would do no good at all. The hirth joint is not some sort of tapered fit that like the old square taper or an ISIS BB. The Hirth comes apart easily by hand, once the bolt it removed. The Ti prep would be a good idea. The 42Nm torque is not that large. If the bolt can't take that, it's a piece of junk.
Last edited by DaveS on Tue Nov 24, 2009 2:39 pm, edited 1 time in total.

User avatar
mitre_tester
Posts: 796
Joined: Thu Dec 04, 2008 7:21 pm
Location: down by the Jubilee River

by mitre_tester

Just weighed some bolts:

Campag stock 16g (10mm hex)
SRP Ti M15 Octalink 9g (8mm hex)
Shimano hollow steel M15 Octalink from FC-M572 9g (10mm hex)

These Al. ones are claimed 20g/pr
http://tartybikes.co.uk/product.php?pro ... ory_id=522

Seems like the Shimano ones are the best bet, as they are steel and use the standard UltraTorque tool. Spare part No Y-1E4 98020 and still fairly widely available. I'll be swapping mine on my WW bike and getting a free 7g saving from the parts bin. Result!

ParisCarbon
Posts: 888
Joined: Mon Feb 05, 2007 5:39 am
Location: Winnipeg Canada

by ParisCarbon

You guys are willing to lock your cranks together with just any bolt and void your warranty to save 7 grams? :shock:

User avatar
mitre_tester
Posts: 796
Joined: Thu Dec 04, 2008 7:21 pm
Location: down by the Jubilee River

by mitre_tester

That Shimano bolt is designed to hold cranks on, and designed to be torqued to about 40Nm. How could this be a problem? Just seems like Campag left a bit too much metal on their bolt.

ParisCarbon
Posts: 888
Joined: Mon Feb 05, 2007 5:39 am
Location: Winnipeg Canada

by ParisCarbon

A Shimano bolt on a Campagnolo Crank??!?!?! :shock: LOL Seriously though.... I would assume Campagnolo has made that bolt heavier for a reason is all I am saying... You'd figure they would do their normal thing.. one year the product comes out, next year they add some Carbon or Ti bling to save 10 grams.. they never did that with UT crank though... Oh well, your crank not mine :)

User avatar
mitre_tester
Posts: 796
Joined: Thu Dec 04, 2008 7:21 pm
Location: down by the Jubilee River

by mitre_tester

ParisCarbon wrote:next year they add some Carbon or Ti bling to save 10 grams..


A bolt which is hidden in the middle of the BB spindle isn't going to be bling whatever you make it from, so it's hardly a candidate for a "Super Record" variant, and you can't label it Ti if you carefully examine the situation and decide that steel really is the best material to use (as I believe it is, in this application)

SL58
Posts: 642
Joined: Tue Oct 30, 2007 5:02 pm

by SL58

I've been using Alu. bolt on UT crank for some time now with no ill effects.

User avatar
tommasini
Posts: 1297
Joined: Sun Nov 02, 2003 6:48 am
Location: Central USA
Contact:

by tommasini

Since someone bumped this old thread up I need to add an update.

Due to my "project" bike not coming together right away (with 2010 steel spindled SR crank), I didn't learn until much, much later that the head of these bolts were ever so slightly too large to work without a small bit of modificaton. So by then the 2011 titanium spindle crankset had been released (with left hand thread on that Ti bolt) so I bought that crankset and sold the bolts (and the 2010 crank separately) on ebay with full disclosure of the bolt issue. So if you come across an ebay seller with a simillar item - don't buy into it - Use the Campy steel bolt unless you have the SR Ti cranks and bolt
Last edited by tommasini on Sat Sep 03, 2011 1:31 pm, edited 3 times in total.

rustychain
Posts: 3915
Joined: Tue Jun 22, 2004 11:42 pm
Location: lat 38.9677 lon 77.3366
Contact:

by rustychain

SR Ti bolt has reversed threads so I doubt that will be an issue
WW Velocipedist Gargantuan

User avatar
HammerTime2
Posts: 5433
Joined: Thu May 04, 2006 4:43 pm
Location: Wherever there's a mountain beckoning to be climbed

by HammerTime2

Why is SR titanium reverse (left hand) threaded from the steel version? Is that just for forced incompatibility so that bolts and cranks are not interchanged?

Post Reply
  • Similar Topics
    Replies
    Views
    Last post