Go Back  Bike Forums > Bike Forums > Classic & Vintage
Reload this Page >

Compact Crank for vintage 7sp?

Notices
Classic & Vintage This forum is to discuss the many aspects of classic and vintage bicycles, including musclebikes, lightweights, middleweights, hi-wheelers, bone-shakers, safety bikes and much more.

Compact Crank for vintage 7sp?

Old 11-16-22, 02:42 PM
  #1  
Coop113
Newbie
Thread Starter
 
Coop113's Avatar
 
Join Date: May 2018
Location: Kentucky
Posts: 54

Bikes: Motobecane Super Mirage (77ish), Surly Karate Monkey, Specialized Roubaix

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 19 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Compact Crank for vintage 7sp?

Hello all,

Over the past fewer years I've been slowly resto-moding a late 70's Motobecane Super Mirage. The project had fallen by the wayside until recently I came a cross a really good deal on a new set of Sun Cr18 rims that had been laced to vintage Shimano freewheel hubs. This wheelset allowed me to convert from 27 to 700c and install 700x38 Panaracer Pasela tires that gave it a really nice ride. I now have a new correctly sized seat post and new saddle on the way to replace what a previous owner had stuck on there. These latest mods have really sparked a new interest in the project which leads me to the next mod on the list and my current question. My goal for this bike is to be a fun all roads cruiser and grocery getter (once I decided on the racks I want) but the current 52/40 crankset is geared a little to high for my liking. I installed a 7sp freewheel with a 32t low gear but its still not enough to put it in the range I'm looking for. What would be the best way for me to get to something like a 48/32 or 46/30 gearing up front without losing to much of the vintage look?

Coop113 is offline  
Likes For Coop113:
Old 11-16-22, 02:49 PM
  #2  
non-fixie 
Shifting is fun!
 
non-fixie's Avatar
 
Join Date: Aug 2009
Location: South Holland, NL
Posts: 10,486

Bikes: Yes, please.

Mentioned: 262 Post(s)
Tagged: 0 Thread(s)
Quoted: 1993 Post(s)
Liked 3,217 Times in 1,355 Posts
These are rather nice, I think, and relatively affordable. Andel crankset with 46/30 rings:

__________________
Perhaps.










non-fixie is offline  
Likes For non-fixie:
Old 11-16-22, 03:10 PM
  #3  
smd4
Senior Member
 
Join Date: Dec 2020
Location: Wake Forest, NC
Posts: 2,579

Bikes: 1989 Cinelli Supercorsa

Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 1560 Post(s)
Liked 1,168 Times in 748 Posts
Originally Posted by non-fixie View Post
These are rather nice, I think, and relatively affordable. Andel crankset with 46/30 rings:

I like those better than what's on there!
smd4 is online now  
Old 11-16-22, 03:33 PM
  #4  
Dylansbob 
2k miles from the midwest
 
Dylansbob's Avatar
 
Join Date: Feb 2005
Location: Washington
Posts: 1,896

Bikes: ~'75 Colin Laing, '80s Schwinn SuperSport 650b, ex-Backroads ti project...

Mentioned: 17 Post(s)
Tagged: 0 Thread(s)
Quoted: 494 Post(s)
Liked 821 Times in 402 Posts
110/74 mtb crank. Something basic like an Sakae Ringo or Sugino VP. Mix-n-match rings.
Dylansbob is offline  
Likes For Dylansbob:
Old 11-16-22, 03:46 PM
  #5  
Soody
Senior Member
 
Soody's Avatar
 
Join Date: Mar 2015
Location: New Zealand
Posts: 995

Bikes: Gunnar, Shogun, Concorde, F Moser, Pete Tansley, Rocky Mtn, Diamant, Krapf, Marin, Avanti, Winora, Emmelle, Ken Evans

Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 252 Post(s)
Liked 339 Times in 191 Posts
The common and inexpensive Sakae CX and SX cranks have a 110bcd, though not compact chainrings. Any 8/9/10 50/34 rings will work on them.




MTB triple as suggested will make a sub-compact. Move the outer ring to the middle, with shorter chainring bolts. I don't love the huge dropoff for trail riding but on a road bike with friction shifting, it's quite good, especially if you can find a fd that matches the ring curvature well to minimize trimming. You'll also find a lot of flogged out nice mtb triples only the middle ring is worn anyway. You can go as extreme as you want with low gears, like 46/22, to ride as a 1x + granny. Not wrapping the smallxsmall crosschained ratios doesn't really matter either so it doesn't require a huge rd cage.


obviously these ones are a little garish for your purpose but you get the idea. The polished XT is the looker.
Soody is offline  
Old 11-16-22, 03:52 PM
  #6  
Soody
Senior Member
 
Soody's Avatar
 
Join Date: Mar 2015
Location: New Zealand
Posts: 995

Bikes: Gunnar, Shogun, Concorde, F Moser, Pete Tansley, Rocky Mtn, Diamant, Krapf, Marin, Avanti, Winora, Emmelle, Ken Evans

Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 252 Post(s)
Liked 339 Times in 191 Posts
that's a really sweet bike too btw and i think your modifications are sensible
Soody is offline  
Old 11-16-22, 03:55 PM
  #7  
Kabuki12
Senior Member
 
Join Date: Jan 2016
Posts: 2,682
Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Quoted: 640 Post(s)
Liked 1,464 Times in 859 Posts
Sugino has a 110BCD crank that is low gear friendly and they are really nice looking cranks . I have one but it is a 165 arm length so I haven't put it to use yet , I prefer 170 or 175 for my long legs and tall bikes.
Kabuki12 is offline  
Old 11-16-22, 03:58 PM
  #8  
Soody
Senior Member
 
Soody's Avatar
 
Join Date: Mar 2015
Location: New Zealand
Posts: 995

Bikes: Gunnar, Shogun, Concorde, F Moser, Pete Tansley, Rocky Mtn, Diamant, Krapf, Marin, Avanti, Winora, Emmelle, Ken Evans

Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 252 Post(s)
Liked 339 Times in 191 Posts
You could also just run an old triple? That would be my preference if you can find a nice one.
Soody is offline  
Old 11-16-22, 04:05 PM
  #9  
Kabuki12
Senior Member
 
Join Date: Jan 2016
Posts: 2,682
Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Quoted: 640 Post(s)
Liked 1,464 Times in 859 Posts
Originally Posted by Soody View Post
You could also just run an old triple? That would be my preference if you can find a nice one.
That is always an option but OP may have to change BB spindles.
Kabuki12 is offline  
Old 11-16-22, 04:10 PM
  #10  
noobinsf 
Senior Member
 
noobinsf's Avatar
 
Join Date: Sep 2005
Location: Oakland, CA
Posts: 3,243

Bikes: '82 Univega Competizione, '72 Motobecane Grand Record, '83 Mercian KOM Touring, '85 Univega Alpina Uno, '76 Eisentraut Limited

Mentioned: 56 Post(s)
Tagged: 0 Thread(s)
Quoted: 1071 Post(s)
Liked 1,136 Times in 673 Posts
Originally Posted by non-fixie View Post
These are rather nice, I think, and relatively affordable. Andel crankset with 46/30 rings:

I used to see these on ebay, but no longer. Where are these available? Andel used to have some nice options under their own brand.
noobinsf is online now  
Old 11-16-22, 04:10 PM
  #11  
Erzulis Boat
3rd Grade Dropout
 
Erzulis Boat's Avatar
 
Join Date: Oct 2005
Location: Santa Barbara Calif.
Posts: 1,621
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 273 Post(s)
Liked 416 Times in 183 Posts

I went the Sugino route.
Erzulis Boat is offline  
Old 11-16-22, 04:16 PM
  #12  
Coop113
Newbie
Thread Starter
 
Coop113's Avatar
 
Join Date: May 2018
Location: Kentucky
Posts: 54

Bikes: Motobecane Super Mirage (77ish), Surly Karate Monkey, Specialized Roubaix

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 19 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Originally Posted by non-fixie View Post
These are rather nice, I think, and relatively affordable. Andel crankset with 46/30 rings:

I like the look of those but i cant find anywhere that sells them. Anyone know where they can be found?
Coop113 is offline  
Old 11-16-22, 05:19 PM
  #13  
non-fixie 
Shifting is fun!
 
non-fixie's Avatar
 
Join Date: Aug 2009
Location: South Holland, NL
Posts: 10,486

Bikes: Yes, please.

Mentioned: 262 Post(s)
Tagged: 0 Thread(s)
Quoted: 1993 Post(s)
Liked 3,217 Times in 1,355 Posts
Originally Posted by Coop113 View Post
I like the look of those but i cant find anywhere that sells them. Anyone know where they can be found?
I got mine from Velo Vitality in Brighton, a couple years ago, but that shop seems to have vanished.

If you like the look this Dia Compe ENE crankset could be an alternative. A little more expensive than the Andel, but still cheaper than the "real thing".
__________________
Perhaps.










non-fixie is offline  
Old 11-16-22, 05:22 PM
  #14  
bark_eater 
Senior Member
 
Join Date: Sep 2017
Location: Eastern Shore, MD
Posts: 1,773

Bikes: Road ready: 1993 Koga Miyata City Liner Touring Hybrid, 1989 Centurion Sport DLX, "I Blame GP" Bridgestone CB-1. Projects: Yea, I got a problem....

Mentioned: 17 Post(s)
Tagged: 0 Thread(s)
Quoted: 618 Post(s)
Liked 397 Times in 264 Posts
If you an handle the ''Q'' factor of a triple crank, replacing the outer ring of a 110/74 mm bcd crank with a chainguard or an old ring with the teeth removed would work well. The Sugino AT would look good.

Last edited by bark_eater; 11-16-22 at 05:51 PM.
bark_eater is offline  
Old 11-16-22, 05:24 PM
  #15  
nlerner
Senior Member
 
Join Date: Dec 2005
Posts: 16,251
Mentioned: 433 Post(s)
Tagged: 0 Thread(s)
Quoted: 3292 Post(s)
Liked 4,837 Times in 2,013 Posts
I bought that Andel crankset from Velo Vitality in the UK back in April. Their website doesn’t seem to be functioning at the moment.

Another option is to grab some 110bcd arms and use the BikingGreen 46/30t rings:

https://www.ebay.com/itm/12370651174...mis&media=COPY
nlerner is offline  
Old 11-16-22, 05:33 PM
  #16  
non-fixie 
Shifting is fun!
 
non-fixie's Avatar
 
Join Date: Aug 2009
Location: South Holland, NL
Posts: 10,486

Bikes: Yes, please.

Mentioned: 262 Post(s)
Tagged: 0 Thread(s)
Quoted: 1993 Post(s)
Liked 3,217 Times in 1,355 Posts
Another option, of course, especially on a French bike, is a "5 vis" set: The 5 Vis appreciation thread.

My favorite is probably the Stronglight 49D. Versatile, affordable, pretty and very light.

__________________
Perhaps.










non-fixie is offline  
Likes For non-fixie:
Old 11-16-22, 06:08 PM
  #17  
seypat
Senior Member
 
Join Date: Oct 2010
Posts: 7,918
Mentioned: 67 Post(s)
Tagged: 0 Thread(s)
Quoted: 2763 Post(s)
Liked 1,932 Times in 1,205 Posts
Another option is an 86BCD crank/rings. You can mount most any combo on those.

Last edited by seypat; 11-16-22 at 07:55 PM.
seypat is offline  
Likes For seypat:
Old 11-16-22, 07:25 PM
  #18  
t2p
Senior Member
 
Join Date: May 2022
Location: USA
Posts: 1,180

Bikes: Cannondale - Gary Fisher - Litespeed - Schwinn Paramount - Schwinn (lugged steel) - Trek OCLV

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 503 Post(s)
Liked 479 Times in 319 Posts
Originally Posted by Soody View Post
The common and inexpensive Sakae CX and SX cranks have a 110bcd, though not compact chainrings. Any 8/9/10 50/34 rings will work on them.




MTB triple as suggested will make a sub-compact. Move the outer ring to the middle, with shorter chainring bolts. I don't love the huge dropoff for trail riding but on a road bike with friction shifting, it's quite good, especially if you can find a fd that matches the ring curvature well to minimize trimming. You'll also find a lot of flogged out nice mtb triples only the middle ring is worn anyway. You can go as extreme as you want with low gears, like 46/22, to ride as a 1x + granny. Not wrapping the smallxsmall crosschained ratios doesn't really matter either so it doesn't require a huge rd cage.


obviously these ones are a little garish for your purpose but you get the idea. The polished XT is the looker.

or

compact crank (58/94) ?

remove the small chainring and just use the middle and big rings

Last edited by t2p; 11-16-22 at 07:32 PM.
t2p is offline  
Old 11-16-22, 07:36 PM
  #19  
t2p
Senior Member
 
Join Date: May 2022
Location: USA
Posts: 1,180

Bikes: Cannondale - Gary Fisher - Litespeed - Schwinn Paramount - Schwinn (lugged steel) - Trek OCLV

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 503 Post(s)
Liked 479 Times in 319 Posts
Originally Posted by bark_eater View Post
If you an handle the ''Q'' factor of a triple crank, replacing the outer ring of a 110/74 mm bcd crank with a chainguard or an old ring with the teeth removed would work well. The Sugino AT would look good.
'Q' factor is apparently a consideration for many (?)

I never had an issue switching from a road bike with a double - and then riding an off road bike with a triple (off road or on road) ... vice-versa

???
t2p is offline  
Old 11-16-22, 07:38 PM
  #20  
52telecaster
ambulatory senior
 
52telecaster's Avatar
 
Join Date: Dec 2016
Location: Peoria Il
Posts: 5,281

Bikes: Bob Jackson World Tour, Falcon and lots of other bikes.

Mentioned: 66 Post(s)
Tagged: 0 Thread(s)
Quoted: 1613 Post(s)
Liked 2,199 Times in 1,084 Posts
https://www.somafabshop.com/shop/new...#attr=319,4018

140$
52telecaster is offline  
Likes For 52telecaster:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell or Share My Personal Information -

Copyright © 2023 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.