Fuji BB size?
10-03-23, 07:46 AM
#2
Senior Member
Join Date: Feb 2012
Location: Rochester, NY
Posts: 18,098
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4211 Post(s)
Liked 3,881 Times
in
2,316 Posts
Right there in your bike is the best source for what it is.
But because that's so hard to do let's speculate some with out doing any interweb searching for specs (hint, hint).
We know the BB shell is threaded, most likely an English standard as has been the case for all the hundreds of threaded BB Fujis I have dealt with. The frame shell width might be 68mm wide or 73mm wide. Generally the 73 is found on MtBs but the 68 could be on either road (hybrid) or MtB. But this is easy to measure with out taking anything apart.
What we don't know is if the crankset is a 3 piece or a two piece design. The 3 piece has separate crank arms and a tapered square axle, the 2 piece has the axle bonded into one of the crank arms. Huge difference but is easily viewed from the outside again. Tapered square BBs will be available in differing axle lengths and this is where many people find it hard to determine with out a take apart. The 2 piece designs will have a fixed length of the axle so no other choices there.
One can get a very close measurement of the tapered square axle length by only removing the arm retaining bolts/nuts and using a caliper measure across the arms right where they mount to the axle. Then on each arm measure in from that point to the end of the axle deep in the arm's tapered hole. Subtract the two arm to axle end amounts from the overall outside to outside one and you have the axle length.
Looking forward to others replies... Andy
But because that's so hard to do let's speculate some with out doing any interweb searching for specs (hint, hint).
We know the BB shell is threaded, most likely an English standard as has been the case for all the hundreds of threaded BB Fujis I have dealt with. The frame shell width might be 68mm wide or 73mm wide. Generally the 73 is found on MtBs but the 68 could be on either road (hybrid) or MtB. But this is easy to measure with out taking anything apart.
What we don't know is if the crankset is a 3 piece or a two piece design. The 3 piece has separate crank arms and a tapered square axle, the 2 piece has the axle bonded into one of the crank arms. Huge difference but is easily viewed from the outside again. Tapered square BBs will be available in differing axle lengths and this is where many people find it hard to determine with out a take apart. The 2 piece designs will have a fixed length of the axle so no other choices there.
One can get a very close measurement of the tapered square axle length by only removing the arm retaining bolts/nuts and using a caliper measure across the arms right where they mount to the axle. Then on each arm measure in from that point to the end of the axle deep in the arm's tapered hole. Subtract the two arm to axle end amounts from the overall outside to outside one and you have the axle length.
Looking forward to others replies... Andy
__________________
AndrewRStewart
AndrewRStewart
Likes For Andrew R Stewart:
10-03-23, 08:05 AM
#3
Full Member
Thread Starter
Join Date: Jun 2022
Posts: 209
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 155 Post(s)
Likes: 0
Liked 26 Times
in
22 Posts
Thanks Andy. I did some research, but still had a bit of confusion. I thought it to be easier to just have you do the work for me!
I'm using a Sora R3000 groupset, which I haven't received yet. But I believe it's a square crank, 2x9. I'm think the frame takes a 68mm, just not sure.
I'm using a Sora R3000 groupset, which I haven't received yet. But I believe it's a square crank, 2x9. I'm think the frame takes a 68mm, just not sure.
10-03-23, 12:55 PM
#5
Senior Member
Join Date: Jul 2020
Location: Humboldt County, CA
Posts: 832
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 405 Post(s)
Likes: 0
Liked 430 Times
in
286 Posts
2x9 Sora crankset on a 2000s road bike?
If I'm betting blind, I'm betting on a Shimano cartridge bottom bracket, English thread, 68 mm shell, 113 mm spindle.
St. Sheldon's site has a huge table of cranksets and the bottom brackets that go with them.
--Shannon
If I'm betting blind, I'm betting on a Shimano cartridge bottom bracket, English thread, 68 mm shell, 113 mm spindle.
St. Sheldon's site has a huge table of cranksets and the bottom brackets that go with them.
--Shannon
10-03-23, 01:17 PM
#6
Senior Member
Join Date: Jul 2015
Location: NW Oregon
Posts: 2,975
Bikes: !982 Trek 930R Custom, Diamondback ascent with SERIOUS updates, Fuji Team Pro CF and a '09 Comencal Meta 5.5
Mentioned: 15 Post(s)
Tagged: 1 Thread(s)
Quoted: 1299 Post(s)
Liked 739 Times
in
534 Posts
if you don't already own a crank removal tool, you'll need one soon enough.
buy one, use it, measure your spindle, and quit waiting for someone else to do it for you.
and once you use that tool, you'll also be able to determine what Bottom Bracket remover tool you will also be needing.
buy one, use it, measure your spindle, and quit waiting for someone else to do it for you.
and once you use that tool, you'll also be able to determine what Bottom Bracket remover tool you will also be needing.
10-03-23, 05:03 PM
#7
Senior Member
Join Date: Feb 2012
Location: Rochester, NY
Posts: 18,098
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4211 Post(s)
Liked 3,881 Times
in
2,316 Posts
The bike industry does mix Imperial and metric on the same spec... BB widths are nearly always stated in metric, 43/16" is about 68.25mm. Where did you measure that 27mm? The usual inside of the frame's shell with an English thread is around 33.5mm. Andy
__________________
AndrewRStewart
AndrewRStewart
10-03-23, 06:50 PM
#8
Senior Member
Join Date: Apr 2011
Posts: 7,077
Mentioned: 41 Post(s)
Tagged: 0 Thread(s)
Quoted: 4416 Post(s)
Liked 1,567 Times
in
1,029 Posts
A 2008 Fuji that had a Mega Exo crank on it is going to be an English (BSA ) BB shell.
https://www.roysbike.com/featured_fuji_roubaix.html
That's all you need to know.
https://www.roysbike.com/featured_fuji_roubaix.html
That's all you need to know.
Last edited by Kontact; 10-03-23 at 06:57 PM.
10-03-23, 08:09 PM
#9
Full Member
Thread Starter
Join Date: Jun 2022
Posts: 209
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 155 Post(s)
Likes: 0
Liked 26 Times
in
22 Posts
I did a quick measurement with an old brass caliper that I have. I assume I was off a bit and that it's a 68mm. As it's threaded, then I think I have a 68 BSA, as Kontct has pointed out. Thanks!
10-03-23, 08:50 PM
#10
SE Wis
Join Date: Apr 2005
Location: Milwaukee, WI
Posts: 10,517
Bikes: '68 Raleigh Sprite, '02 Raleigh C500, '84 Raleigh Gran Prix, '91 Trek 400, 2013 Novara Randonee, 1990 Trek 970
Mentioned: 40 Post(s)
Tagged: 0 Thread(s)
Quoted: 2747 Post(s)
Liked 3,401 Times
in
2,058 Posts
Says it's a Ht II which has no 'length" as the spindle is part of the crank.
https://bike.shimano.com/en-EU/produ.../FC-R3000.html
https://bike.shimano.com/en-EU/produ.../FC-R3000.html
10-03-23, 08:55 PM
#11
Full Member
Thread Starter
Join Date: Jun 2022
Posts: 209
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 155 Post(s)
Likes: 0
Liked 26 Times
in
22 Posts
I have to tell you. I went into the project of building a bike for my son, but this BB issue (making sure I get the right one for the crank I'm waiting for, which I haven't receieved yet) is putting me off a bit. I'm now thinking it's best for me to obtain as many parts as I can and just have my LBS build it out for me. They're a good bunch of guys.
10-03-23, 09:01 PM
#12
Senior Member
Join Date: Apr 2011
Posts: 7,077
Mentioned: 41 Post(s)
Tagged: 0 Thread(s)
Quoted: 4416 Post(s)
Liked 1,567 Times
in
1,029 Posts
Says it's a Ht II which has no 'length" as the spindle is part of the crank.
https://bike.shimano.com/en-EU/produ.../FC-R3000.html
https://bike.shimano.com/en-EU/produ.../FC-R3000.html
10-03-23, 09:14 PM
#13
Full Member
Thread Starter
Join Date: Jun 2022
Posts: 209
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 155 Post(s)
Likes: 0
Liked 26 Times
in
22 Posts
Kontact, thanks man. I really appreciate all the info that I get from eveyone on this site. But sometimes I just get confused with all the info I'm presented with.
So, I have a Fuji Roubaix, circa 2008. Threaded BB, pretty sure it's BSA, 68mm. I'll be using a Sora R3000 groupo (double.) I'd like to get a less expensive, but reliable BB, probably a Shimano. If anyone has an exact recommendation, let me know. Sorry if I didn't give sufficient info for a recommendation. I'm kind of new to the whole "build" thing.
Thanks everyone!
So, I have a Fuji Roubaix, circa 2008. Threaded BB, pretty sure it's BSA, 68mm. I'll be using a Sora R3000 groupo (double.) I'd like to get a less expensive, but reliable BB, probably a Shimano. If anyone has an exact recommendation, let me know. Sorry if I didn't give sufficient info for a recommendation. I'm kind of new to the whole "build" thing.
Thanks everyone!
Likes For ArgoMan:
10-04-23, 06:52 AM
#15
SE Wis
Join Date: Apr 2005
Location: Milwaukee, WI
Posts: 10,517
Bikes: '68 Raleigh Sprite, '02 Raleigh C500, '84 Raleigh Gran Prix, '91 Trek 400, 2013 Novara Randonee, 1990 Trek 970
Mentioned: 40 Post(s)
Tagged: 0 Thread(s)
Quoted: 2747 Post(s)
Liked 3,401 Times
in
2,058 Posts
Thanks Andy. I did some research, but still had a bit of confusion. I thought it to be easier to just have you do the work for me!
I'm using a Sora R3000 groupset, which I haven't received yet. But I believe it's a square crank, 2x9. I'm think the frame takes a 68mm, just not sure.
I'm using a Sora R3000 groupset, which I haven't received yet. But I believe it's a square crank, 2x9. I'm think the frame takes a 68mm, just not sure.
10-04-23, 07:05 AM
#16
Senior Member
Join Date: Apr 2011
Posts: 7,077
Mentioned: 41 Post(s)
Tagged: 0 Thread(s)
Quoted: 4416 Post(s)
Liked 1,567 Times
in
1,029 Posts
10-04-23, 02:09 PM
#18
Senior Member
Join Date: Jun 2002
Location: Montreal, Quebec
Posts: 5,932
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 1821 Post(s)
Liked 1,697 Times
in
977 Posts
If you are buying a new crank, the one that you have now doesn't matter. Your bike has a standard BSC threaded bottom bracket shell. Your new crank will need whatever bottom bracket is required by that new crank
10-04-23, 02:25 PM
#19
Full Member
Thread Starter
Join Date: Jun 2022
Posts: 209
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 155 Post(s)
Likes: 0
Liked 26 Times
in
22 Posts
Thank you. I'm again much enthused about taking on this project. It's pretty funny, as I have lots of construction and fabrication experience. Yet this whole bike build-thing has got me sideways! Everyone's help here is greatly apprenticed!
10-04-23, 03:16 PM
#20
Senior Member
Join Date: Jun 2002
Location: Montreal, Quebec
Posts: 5,932
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 1821 Post(s)
Liked 1,697 Times
in
977 Posts
There is nothing complicated here. You buy a new crankset, you have a bike with very standard requirements, you buy the bottom bracket that meets both the frame requirements and the requirements of the crank that you are buying
