Rear-Rack Torque-Specs
#2
Every day a winding road
Joined: Mar 2005
Posts: 6,538
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From: Pittsburgh, PA
Bikes: 2005 Cannondale SR500, 2008 Trek 7.3 FX, Jamis Aurora
Does anyone apply a torque wrench to their rear rack? I sure don't. Just tighten and go.
Would you actually haul a torque wrench with you on tour?
Would you actually haul a torque wrench with you on tour?
#3
Senior Member



Joined: Aug 2010
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From: Madison, WI
Bikes: 1961 Ideor, 1966 Perfekt 3 Speed AB Hub, 1994 Bridgestone MB-6, 2006 Airnimal Joey, 2009 Thorn Sherpa, 2013 Thorn Nomad MkII, 2015 VO Pass Hunter, 2017 Lynskey Backroad, 2017 Raleigh Gran Prix, 1980s Bianchi Mixte on a trainer. Others are now gone.
Probably a generic value for an M5 bolt would apply. Since I never used a torque wrench on an M5 bolt, I can't help. Try Google search.
I recommend blue loctite (or similar) on all rack bolts by the way.
The only bolts on a bike that I use my torque wrench on are my crank arm bolts on a square taper bottom bracket. Other fittings I go by feel.
I recommend blue loctite (or similar) on all rack bolts by the way.
The only bolts on a bike that I use my torque wrench on are my crank arm bolts on a square taper bottom bracket. Other fittings I go by feel.
#4
Every day a winding road
Joined: Mar 2005
Posts: 6,538
Likes: 63
From: Pittsburgh, PA
Bikes: 2005 Cannondale SR500, 2008 Trek 7.3 FX, Jamis Aurora
Probably a generic value for an M5 bolt would apply. Since I never used a torque wrench on an M5 bolt, I can't help. Try Google search.
I recommend blue loctite (or similar) on all rack bolts by the way.
The only bolts on a bike that I use my torque wrench on are my crank arm bolts on a square taper bottom bracket. Other fittings I go by feel.
I recommend blue loctite (or similar) on all rack bolts by the way.
The only bolts on a bike that I use my torque wrench on are my crank arm bolts on a square taper bottom bracket. Other fittings I go by feel.
I use a bungee from the top leading edge of the rack to the seat post. A nice insurance policy that is not too weight costly.
#6
Thread Starter
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Joined: Jun 2016
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From: S/W U.S.
Bikes: 2016 Novara - Safari
Being that it's a weight bearing part, specified to carry a specified weight, I'd expect a recommend torque value to be given. If need me I'll just make it up as I go along as suggested.
#7
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Bikes: 2013 Surly Disc Trucker, 2004 Novara Randonee , old fixie , etc
Folks don't take torque wrenches on tour but it'd still be interesting to check on all the bike bolts to see how hand-tightening stacks up.
For me the biggest issue in keeping rack etc bolts tight is having good tools that minimize risk of rounding out the caps. I bought some German-made Bondhus & Wera Allen keys & screwdrivers that seem to fit better than cheapos so theoretically will allow more torque.
I see some endorsements for Vibra-Tite VC3 thread compound, supposedly it still works after disassembly/reassembly whereas blue Loctite I think needs to be reapplied.
Any favorite M5 bolts? Seems logical to get a good spec for the minimal extra cost.
For me the biggest issue in keeping rack etc bolts tight is having good tools that minimize risk of rounding out the caps. I bought some German-made Bondhus & Wera Allen keys & screwdrivers that seem to fit better than cheapos so theoretically will allow more torque.
I see some endorsements for Vibra-Tite VC3 thread compound, supposedly it still works after disassembly/reassembly whereas blue Loctite I think needs to be reapplied.
Any favorite M5 bolts? Seems logical to get a good spec for the minimal extra cost.
#8
Thread Starter
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Joined: Jun 2016
Posts: 806
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From: S/W U.S.
Bikes: 2016 Novara - Safari
Folks don't take torque wrenches on tour but it'd still be interesting to check on all the bike bolts to see how hand-tightening stacks up.
For me the biggest issue in keeping rack etc bolts tight is having good tools that minimize risk of rounding out the caps. I bought some German-made Bondhus & Wera Allen keys & screwdrivers that seem to fit better than cheapos so theoretically will allow more torque.
I see some endorsements for Vibra-Tite VC3 thread compound, supposedly it still works after disassembly/reassembly whereas blue Loctite I think needs to be reapplied.
Any favorite M5 bolts? Seems logical to get a good spec for the minimal extra cost.
For me the biggest issue in keeping rack etc bolts tight is having good tools that minimize risk of rounding out the caps. I bought some German-made Bondhus & Wera Allen keys & screwdrivers that seem to fit better than cheapos so theoretically will allow more torque.
I see some endorsements for Vibra-Tite VC3 thread compound, supposedly it still works after disassembly/reassembly whereas blue Loctite I think needs to be reapplied.
Any favorite M5 bolts? Seems logical to get a good spec for the minimal extra cost.
#9
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Joined: Jun 2013
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From: Bozeman
Bikes: 199? Landshark Roadshark, 198? Mondonico Diamond, 1987 Panasonic DX-5000, 1987 Bianchi Limited, Univega... Chrome..., 1989 Schwinn Woodlands, Motobecane USA Record, Raleigh Tokul 2
Depends. If it's on a steel bike I'll use the "until my long allen key bends a bit when I hold it by the end." If it's an aluminum bike I go a bit less. Carbon I'll get the torque wrench out and try to find a number, but I don't have carbon bikes so...
#10
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Joined: Aug 2009
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From: North of Boston
Bikes: Kona Dawg, Surly 1x1, Karate Monkey, Rockhopper, Crosscheck , Burley Runabout,
Apply grease and use a nylock bolt on the other end? If there is room, I get a longer bolt, make it go through the rack bolt hole, and put a nut on the other side. None have come loose.
#11
Banned
Joined: Jun 2010
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From: NW,Oregon Coast
Bikes: 8
One Guy included a Klicker Pre set Torque socket.., for 5x.8mm bolts (like the 6 holding on Discs)
He had a Fancy Carbon Bike He was to Tour On, down the OR Cal Coast.
IDK Why The OP cannot just call REI?
./.
He had a Fancy Carbon Bike He was to Tour On, down the OR Cal Coast.
IDK Why The OP cannot just call REI?
./.
#13
I use a torque wrench for a lot of things when doing maintenance at home, but have not used them for rack bolts.
I have a little different system than most, but it works for me:
-I don't use locktight on any of my bolts.
-I apply a thin coating of grease to all my bolts. I believe a clean, lubricated bolt can be installed tighter than a dirty, gummed up with locktight bolt using the same force. Initial installations using locktight are different, but once the locktight dries on the threads reinstallation is a different story.
-Bolts are tightened to torque specs, or in the case of rack bolts, until they are "snug".
-"Snugness" varies depending if the steel bolt is going into an aluminum or steel frame/fork.
-On tours rack bolts are checked about every 3 to 7 days. this is the interval that I usually do cleaning and preventative maintenance on tours.
I've never had a bolt problem.
I have a little different system than most, but it works for me:
-I don't use locktight on any of my bolts.
-I apply a thin coating of grease to all my bolts. I believe a clean, lubricated bolt can be installed tighter than a dirty, gummed up with locktight bolt using the same force. Initial installations using locktight are different, but once the locktight dries on the threads reinstallation is a different story.
-Bolts are tightened to torque specs, or in the case of rack bolts, until they are "snug".
-"Snugness" varies depending if the steel bolt is going into an aluminum or steel frame/fork.
-On tours rack bolts are checked about every 3 to 7 days. this is the interval that I usually do cleaning and preventative maintenance on tours.
I've never had a bolt problem.
Last edited by Doug64; 09-12-16 at 10:13 PM.
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richeydog
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