Rear spacing question
#1
Senior Member
Thread Starter
Rear spacing question
The new Atala bike I received this week has 126mm rear spacing. I was surprised to see the rear hub has 130mm spacing. The wheel goes on fine as long a you spread the frame a little, but I was wondering if this is an issue in any way? Also, does this mean I can switch to a 7 speed freewheel instead of the 6 spped it came with? Or am I missing something here? Would an 84 bike have come with a hub that has 130mm spacing, or was this maybe an upgrade?
Thanks in advance! Chris
Thanks in advance! Chris
__________________
Chris
Crapmaster Emeritus
Chris
Crapmaster Emeritus
#2
Senior Member
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 38,546
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Mentioned: 139 Post(s)
Tagged: 1 Thread(s)
Quoted: 5703 Post(s)
Liked 2,434 Times
in
1,346 Posts
First of all it's not a problem, as long as you're OK with spreading the frame each time you install the wheel.
You also have the option of spreading the frame to 130mm.
Going to 7s shouldn't be an issue, since 6s and 7s freewheels are similar in width. There's an off chance that you might need to replace the axle about 1-2mm. Normally, replacing the axle means relishing the wheel, but it's not critical for such a small change.
You also have the option of spreading the frame to 130mm.
Going to 7s shouldn't be an issue, since 6s and 7s freewheels are similar in width. There's an off chance that you might need to replace the axle about 1-2mm. Normally, replacing the axle means relishing the wheel, but it's not critical for such a small change.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
#3
Senior Member
Shouldn't be a problem. Kind of weird having a 6 speed freewheel on a 130 spaced hub. If that's the case though, should be even easier than normal to put a 7 speed on there. As FB noted, sometimes you have to re-dish the wheel going 6 to 7 speed.
I have an 8 speed Campy group on a 126 spaced frame and it works great.
I have an 8 speed Campy group on a 126 spaced frame and it works great.
__________________
N = '96 Colnago C40, '04 Wilier Alpe D'Huez, '10 Colnago EPS, '85 Merckx Pro, '89 Merckx Century, '86 Tommasini Professional, '04 Teschner Aero FX Pro, '05 Alan Carbon Cross, '86 De Rosa Professional, '82 Colnago Super, '95 Gios Compact Pro, '95 Carrera Zeus, '84 Basso Gap, ‘89 Cinelli Supercorsa, ‘83 Bianchi Specialissima, ‘VO Randonneur, Ritchey Breakaway Steel, '84 Paletti Super Prestige, Heron Randonneur
N = '96 Colnago C40, '04 Wilier Alpe D'Huez, '10 Colnago EPS, '85 Merckx Pro, '89 Merckx Century, '86 Tommasini Professional, '04 Teschner Aero FX Pro, '05 Alan Carbon Cross, '86 De Rosa Professional, '82 Colnago Super, '95 Gios Compact Pro, '95 Carrera Zeus, '84 Basso Gap, ‘89 Cinelli Supercorsa, ‘83 Bianchi Specialissima, ‘VO Randonneur, Ritchey Breakaway Steel, '84 Paletti Super Prestige, Heron Randonneur
#4
Senior Member
The new Atala bike I received this week has 126mm rear spacing. I was surprised to see the rear hub has 130mm spacing. The wheel goes on fine as long a you spread the frame a little, but I was wondering if this is an issue in any way? Also, does this mean I can switch to a 7 speed freewheel instead of the 6 spped it came with? Or am I missing something here? Would an 84 bike have come with a hub that has 130mm spacing, or was this maybe an upgrade?
Thanks in advance! Chris
Thanks in advance! Chris
- Mark
Last edited by markjenn; 10-08-17 at 09:50 AM.
#5
Senior Member
Join Date: Nov 2004
Posts: 23,233
Mentioned: 652 Post(s)
Tagged: 1 Thread(s)
Quoted: 4719 Post(s)
Likes: 0
Liked 3,034 Times
in
1,874 Posts
Theoretically, you should cold set the stays to 130mm spacing and re-align the dropouts. The issue with just springing the rear triangle is that the wider hub installed in a narrower rear triangle puts a bending stress on the axle. Typically, this does not cause a problem with cassette equipped freehubs, due to the wider bearing spacing. However, traditional hubs equipped with freewheels are more prone to axle bending in this application.
A 130mm hub should accept a 7 and even 8 speed freewheel without issue. A 1984 road bicycle would not have come equipped with a 130mm hub. 130mm/8 speed was introduced circa 1989, by Shimano, on Dura-Ace. 126mm hubs would be correct for 1984 vintage. Most 126mm hubs accept 7 speed freewheels without modification, though some may require the addition of thin driveside spacer, in order to provide clearance between the drive side stays and small cog/chain. It's typically a stay design issue more than a frewheel/hub issue.
A 130mm hub should accept a 7 and even 8 speed freewheel without issue. A 1984 road bicycle would not have come equipped with a 130mm hub. 130mm/8 speed was introduced circa 1989, by Shimano, on Dura-Ace. 126mm hubs would be correct for 1984 vintage. Most 126mm hubs accept 7 speed freewheels without modification, though some may require the addition of thin driveside spacer, in order to provide clearance between the drive side stays and small cog/chain. It's typically a stay design issue more than a frewheel/hub issue.
#6
Senior Member
Thread Starter
Thanks for all of the responses, I appreciate it. I do have options. Keep using the wheels as is, experiment with 7-speed maybe as well. The downside is these are tubular rims. Not sure I want to go tubular or not. I did have tubulars on my racing bike in the early 90's. Also, when you talk about stress on the axle, I am heavy, so this could be exacerbated. I have a set of 27" campy/mavic clinchers that are spaced at 126mm, as well as some 700c campy, with campy aero clinchers that are also spaced at 126mm. I like the third option, but the wheels are non-Eroica with the aero rims. But they are beautiful and bomb proof.
__________________
Chris
Crapmaster Emeritus
Chris
Crapmaster Emeritus
#7
Senior Member
Join Date: Nov 2015
Posts: 4,457
Mentioned: 102 Post(s)
Tagged: 0 Thread(s)
Quoted: 1629 Post(s)
Likes: 0
Liked 814 Times
in
527 Posts
I have encountered 126mm frames that could not accommodate my 7 speed FWs. Could not really figure out whether it's how how the stays or the dropouts were designed but the 13 cog definitely hit the bottom of the DS seat stay, when I try to install the rear wheel. So, I would say that it could be a case by case basis when installing a 7 speed FW on to a 126 spaced frame....
__________________
72 Line Seeker
83 Davidson Signature
84 Peugeot PSV
84 Peugeot PY10FC
84 Gitane Tour de France.
85 Vitus Plus Carbone 7
86 ALAN Record Carbonio
86 Medici Aerodynamic (Project)
88 Pinarello Montello
89 Bottecchia Professional Chorus SL
95 Trek 5500 OCLV (Project)
72 Line Seeker
83 Davidson Signature
84 Peugeot PSV
84 Peugeot PY10FC
84 Gitane Tour de France.
85 Vitus Plus Carbone 7
86 ALAN Record Carbonio
86 Medici Aerodynamic (Project)
88 Pinarello Montello
89 Bottecchia Professional Chorus SL
95 Trek 5500 OCLV (Project)