Changing Bottom Bracket
10-16-17 | 09:07 PM
#1
Thread Starter
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Joined: Dec 2009
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Changing Bottom Bracket
Hi everyone,
I want to change my bottom bracket. I own a 2011 Surly Long Haul Trucker. Would this bottom bracket fit: Shimano UN55 BB Square Taper Bottom Bracket. See https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1.
I want to change my bottom bracket. I own a 2011 Surly Long Haul Trucker. Would this bottom bracket fit: Shimano UN55 BB Square Taper Bottom Bracket. See https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1.
10-16-17 | 10:58 PM
#2
Interocitor Command
Joined: Oct 2003
Posts: 3,375
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From: The adult video section
Bikes: 3 Road Bikes, 2 Hybrids
You may get more accurate responses in the Mechanics section ...
https://www.bikeforums.net/bicycle-mechanics/
https://www.bikeforums.net/bicycle-mechanics/
10-16-17 | 11:35 PM
#3
Senior Member
Joined: Jul 2007
Posts: 1,113
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The UN55 seems to be an upgraded UN54, so it should work fine.
68 x 118, according to Surly's spec sheet. https://surlybikes.com/uploads/downloads/2011_Surly_Catalog.pdf
68 x 118, according to Surly's spec sheet. https://surlybikes.com/uploads/downloads/2011_Surly_Catalog.pdf
Last edited by Pendergast; 10-16-17 at 11:40 PM.
10-17-17 | 08:02 AM
#5
Mad bike riding scientist
Joined: Nov 2004
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From: Denver, CO
Bikes: Some silver ones, a red one, a black and orange one, and a few titanium ones
Hi everyone,
I want to change my bottom bracket. I own a 2011 Surly Long Haul Trucker. Would this bottom bracket fit: Shimano UN55 BB Square Taper Bottom Bracket. See https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1.
I want to change my bottom bracket. I own a 2011 Surly Long Haul Trucker. Would this bottom bracket fit: Shimano UN55 BB Square Taper Bottom Bracket. See https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1.
If you do have to replace it, that bottom bracket would work as long as you get the proper length. You'll have to pull the cranks and measure it to be sure.
Finally, you can do better on the price. A quick Google finds them for around $15. If you are going to pay full retail, you might as well get one at your local bike shop and help them keep the lights on.
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Stuart Black
Dreamin' of Bemidji Down the Mississippi (in part)
Plan Epsilon Around Lake Michigan in the era of Covid
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
10-17-17 | 08:15 AM
#6
Senior Member
Joined: May 2011
Posts: 3,780
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From: Upstate NY
Bikes: Bianchi San Mateo and a few others
Bottom brackets have to fit both the frame and the crankset. The UN55 bottom bracket is available in multiple threadings and shell widths to fit different frames and multiple spindle lengths to fit various square taper cranksets.
To fit your LHT's frame, you'd want an English-threaded 68 mm UN55 bottom bracket.
If you have a square taper crankset, you'd need to select a bottom bracket with an appropriate spindle length. Ideally, you'd measure your existing bottom bracket's spindle length and select a comparable replacement. Otherwise, you may be able to check your crankset's spec sheet. Or if you're visiting a shop in person, they can test-fit bottom brackets to confirm what fits.
To fit your LHT's frame, you'd want an English-threaded 68 mm UN55 bottom bracket.
If you have a square taper crankset, you'd need to select a bottom bracket with an appropriate spindle length. Ideally, you'd measure your existing bottom bracket's spindle length and select a comparable replacement. Otherwise, you may be able to check your crankset's spec sheet. Or if you're visiting a shop in person, they can test-fit bottom brackets to confirm what fits.
10-17-17 | 09:17 AM
#7
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Joined: Dec 2009
Posts: 392
Likes: 7
The more important question is why do you want to change your bottom bracket. Unless it is malfunctioning...which seems unlikely for a 6 year old bottom bracket...you are probably going to be replacing like for like.
If you do have to replace it, that bottom bracket would work as long as you get the proper length. You'll have to pull the cranks and measure it to be sure.
Finally, you can do better on the price. A quick Google finds them for around $15. If you are going to pay full retail, you might as well get one at your local bike shop and help them keep the lights on.
If you do have to replace it, that bottom bracket would work as long as you get the proper length. You'll have to pull the cranks and measure it to be sure.
Finally, you can do better on the price. A quick Google finds them for around $15. If you are going to pay full retail, you might as well get one at your local bike shop and help them keep the lights on.
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zachismisitok
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