ravenmore

Hi all,

Here's the bike in question:



It's an old Centurion Ironman Master I rescued from a junk heap and then fitted with a 10 speed drive train (those are 10 spd Dura Ace dt shifters). Problem is I sometimes apply enough torque to the rear wheel that the wheel/hub slips sideways, and the tire ends up rubbing the left chain stay (it has removed the paint and polished the metal underneath actually. I realize I'm putting a 130mm hub in a frame designed for 127mm spacing (deflecting each side 1.5mm is no big deal). Any thoughts about things I could try to keep this from happening?

cs1

That's one nice looking bike. Can't say for sure about your problem but I love the bike. Seriously, I've done that mod on several of my bikes and always had the wheel centered in the dropouts. You might want to take it to a shop and check for alignment issues. Good luck.

Bill Kapaun

IF it's a QR axle, is the axle too long? The axle ends must be slightly below flush of the dropouts for the QR to gain adequate purchase and not slip.
Maybe a thin washer on the DS between the locknut & frame?

ravenmore

Man - bet that's it. I didn't think about it until you mentioned it but it makes perfect sense. I'm kind of proud of this build - couple more pics.

Retro Grouch 

What kind of quick releases are you using? Genuine Shimano quick releases, or any that have the mechanism hidden, grip much, much more firmly than most of the boutique brands.

well biked

Those wheels probably don't have internal cam QR's. Get a Shimano or Campy QR, problem will likely be solved-

Retro Grouch 

You're right, well biked, but you're too slow.

ravenmore

They're Topolino QR's (bought a pair of their wheels a while back and kept the skewers). I think I might have a shimano skewer laying around somewhere...

K6-III

You've got horizontal dropouts...which requires skewers with steel locknuts. Aluminum just doesn't work for horizontal dropouts.

If those are Mavic skewers with a steel locknut, just tighten them down plenty and you should be OK. Otherwise, get your hands on an old skewer out of a junkpile and your problem should be solved.

well biked

Yep. Same as when I'm riding-

ultraman6970

Do those shifters work in friction mode?? Thanks.

HillRider

Yes, they should have two positions indicated on the ring around the rear shift lever. When the arrow points to "SIS" they are in the indexing position and rotating the D-ring so the arrow points to "FRICT" gives friction shifting.

I certainly agree about the need for a Campy or Shimano internal cam skewer. "Boutique" skewers should be limited to vertical dropouts if they are used at all.

ultraman6970

Just asking about the shifters because of a steel pinarello i got, have a few shimano and campy wheels moving around and friction mode dt shifters will do a lot for the cause

GRedner

I have nothing to add, except that's a gorgeous bike. It's nice to see what can be done with an old frame. My Centurion ('85 LeMans RS, set up as a fair-weather commuter bike) says "hi!"

ravenmore

thanks all - yeah, I just love how this build came together.

I went looking through my spare parts bin. I found a couple of shimano skewers, but then found a Mavic skewer I bought specifically because my shop mechanic said it had more clamping force than even a shimano skewer. I put it on and then went for a 40 mile ride. I wasn't able to get the hub to slip no matter what, so hopefully this will take care of the issue.