Anybody have problems with Sugino 75 bottom brackets getting loose prematurely?
03-14-23, 06:12 PM
#1
Junior Member
Thread Starter
Join Date: Apr 2008
Posts: 160
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 15 Post(s)
Likes: 0
Liked 2 Times
in
2 Posts
Anybody have problems with Sugino 75 bottom brackets getting loose prematurely?
The cartridge version. I recently installed one and only went on a few 10-ish mile commutes before it got loose and started knocking. Sure, I backpedal and skid a lot, but my other BBs still went a long time before coming loose.
I checked the torque specs on the Sugino site; it's just like any other square taper BB. Not sure what gives. I've since re-installed it and am hoping for the best.
Also, I notice there's a very tiny bit of play in the bearings. It that normal? At least it spins nicely LOL Hope I didn't get a dud.
I checked the torque specs on the Sugino site; it's just like any other square taper BB. Not sure what gives. I've since re-installed it and am hoping for the best.
Also, I notice there's a very tiny bit of play in the bearings. It that normal? At least it spins nicely LOL Hope I didn't get a dud.
Last edited by bike-izle; 03-14-23 at 06:14 PM. Reason: Clarification
03-14-23, 09:42 PM
#3
Clark W. Griswold
Join Date: Mar 2014
Location: ,location, location
Posts: 11,865
Bikes: Foundry Chilkoot Ti W/Ultegra Di2, Salsa Timberjack Ti, Cinelli Mash Work RandoCross Fun Time Machine, 1x9 XT Parts Hybrid, Co-Motion Cascadia, Specialized Langster, Phil Wood Apple VeloXS Frame (w/DA 7400), R+M Supercharger2 Rohloff, Habanero Ti 26
Mentioned: 50 Post(s)
Tagged: 0 Thread(s)
Quoted: 3688 Post(s)
Liked 3,120 Times
in
2,082 Posts
If you don't skid your tidy whities don't skid your bike.
In terms of loose bottom brackets, it really shouldn't happen and shouldn't really have play but with a lot of abuse that can happen. On the track one would never really need to uncontrollably slow down by locking up their knees and rear wheel leaving skid marks and Sugino 75 is designed for track racing. If you are on the road brakes exist for a good reason and will help end premature wear and damage of parts and will also save your knees and your tidy whiteys . I would agree with TugaDude and have a good mechanic take a look at it as that is not generally common. It could be a bad B.B. it could be installation issues or it could genuinely be use and abuse.
In terms of loose bottom brackets, it really shouldn't happen and shouldn't really have play but with a lot of abuse that can happen. On the track one would never really need to uncontrollably slow down by locking up their knees and rear wheel leaving skid marks and Sugino 75 is designed for track racing. If you are on the road brakes exist for a good reason and will help end premature wear and damage of parts and will also save your knees and your tidy whiteys . I would agree with TugaDude and have a good mechanic take a look at it as that is not generally common. It could be a bad B.B. it could be installation issues or it could genuinely be use and abuse.
03-14-23, 10:16 PM
#4
Senior Member
Join Date: Oct 2014
Location: Portland, OR
Posts: 11,790
Bikes: (2) ti TiCycles, 2007 w/ triple and 2011 fixed, 1979 Peter Mooney, ~1983 Trek 420 now fixed and ~1973 Raleigh Carlton Competition gravel grinder
Mentioned: 120 Post(s)
Tagged: 0 Thread(s)
Quoted: 4129 Post(s)
Liked 3,086 Times
in
2,010 Posts
When you say "coming loose" do you mean the bearings or the crank bolts?
03-15-23, 09:00 PM
#5
Junior Member
Thread Starter
Join Date: Apr 2008
Posts: 160
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 15 Post(s)
Likes: 0
Liked 2 Times
in
2 Posts
Originally Posted by 79pmooney
When you say "coming loose" do you mean the bearings or the crank bolts?
1) I'm a Tech/Wheelbuilder at a bike shop. I've probably installed 1000s of BBs. My coworkers are "roadies" and MTBers and pretty much poo poo my bike/component choices, so they're not much help.
2) The BB had a thick layer of hard, dried up, white thread locker on it which might have caused me to think it was sufficiently tightened when that wasn't the case.
3) I purchased the BB from Blue Lug during the thick of the Pandemic when these were sold out everywhere else. The price seemed cheap compared to US standards, which kinda made me suspect it was some sort of "factory second."
Anyway, I'll have to wait and see what happens this time around. It would be good if I can find some track-oriented mechs to consult with.
