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

Max Tooth for Shimano 600 RD-6401?

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.

Max Tooth for Shimano 600 RD-6401?

Old 04-16-11, 10:17 PM
  #1  
you
Senior Member
Thread Starter
 
Join Date: Feb 2005
Location: San Francsico, CA
Posts: 324

Bikes: Schwinn Voyageur '89

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Max Tooth for Shimano 600 RD-6401?

I know it's not super vintage, but I have a '92 Shimano RD-6401 on my road bike. It currently has a big ring of 25t and I read that Shimano lists the max as 28t. While the 25t was fine in the flats of N. Ohio, I feel like the 28t may be even a bit much (even with a 38t small ring up front) for the ridges and gullies around the SF Bay. Has anyone gotten away with larger than a 28t ring with a Shimano 600 RD (RD-6401).
Thanks!
you is offline  
Old 04-16-11, 10:20 PM
  #2  
Jeff Wills
Insane Bicycle Mechanic
 
Jeff Wills's Avatar
 
Join Date: Mar 2008
Location: other Vancouver
Posts: 9,050
Mentioned: 28 Post(s)
Tagged: 0 Thread(s)
Quoted: 464 Post(s)
Liked 50 Times in 36 Posts
It depends on the bike and how far you're willing to finagle the setup. With the right hanger, chain length, and B-tension adjustment it should reach a 30-tooth cog.
__________________
Jeff Wills

Comcast nuked my web page. It will return soon..
Jeff Wills is online now  
Old 04-16-11, 10:20 PM
  #3  
you
Senior Member
Thread Starter
 
Join Date: Feb 2005
Location: San Francsico, CA
Posts: 324

Bikes: Schwinn Voyageur '89

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Am I being a baby? should a 38x28 gearing be fine for most hills?
you is offline  
Old 04-17-11, 07:17 AM
  #4  
The MAX
Senior Member
 
The MAX's Avatar
 
Join Date: Mar 2010
Posts: 313

Bikes: Surly Long haul Trucker with front and rack Nice Racks, 1984 Colnago Sport, 1983 Raleigh Condor

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I ride in Halifax, Nova Scotia, Canada. Pretty hilly. My road bike has 42x28 for it's lowest gear and I manage.

Although my touring bike has 26x34
The MAX is offline  
Old 04-17-11, 07:21 AM
  #5  
Road Fan
Senior Member
 
Road Fan's Avatar
 
Join Date: Apr 2005
Location: Ann Arbor, MI
Posts: 14,355

Bikes: 1980 Masi, 1984 Mondonico, 1984 Trek 610, 1980 Woodrup Giro, 2005 Mondonico Futura Leggera ELOS, 1967 PX10E, 1971 Peugeot UO-8

Mentioned: 35 Post(s)
Tagged: 0 Thread(s)
Quoted: 863 Post(s)
Liked 35 Times in 32 Posts
Originally Posted by you View Post
Am I being a baby? should a 38x28 gearing be fine for most hills?
Being a baby, "managing," et cetera are all irrelevant. If you're a cyclist who does not wish to stress your knees unnecesarily, then get the lower gears. Knee injuries are a real risk, and are not to be played with. If somebody else does not feel the need to be easier on their knees, good luck to them. But your knees are YOUR knees, as will be the effort of healing any problems you may cause.
Road Fan is offline  
Old 04-17-11, 08:23 AM
  #6  
top506
Death fork? Naaaah!!
 
top506's Avatar
 
Join Date: Nov 2005
Location: The other Maine, north of RT 2
Posts: 4,642

Bikes: Seriously downsizing.

Mentioned: 33 Post(s)
Tagged: 0 Thread(s)
Quoted: 307 Post(s)
Likes: 0
Liked 19 Times in 15 Posts
I've run several Shimano road RDs with 30t clusters in back and had no problems.
38/28 is NOT 'weeine gearing' around here. My regular riders are set up as such or 40/30, also known as reverse Krag gearing.

Top
__________________
You know it's going to be a good day when the stem and seatpost come right out.

(looking for a picture and not seeing it? Thank the Photobucket fiasco.PM me and I'll link it up.)
top506 is offline  
Old 08-23-14, 07:17 PM
  #7  
krobinson103
Senior Member
 
Join Date: Mar 2012
Location: Incheon, South Korea
Posts: 2,836

Bikes: Nothing amazing... cheap old 21 speed mtb

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I run 26/32 on my tourer as the lowest. Fully loaded on a steep hill its a very useful gear.
krobinson103 is offline  
Old 09-09-14, 01:25 PM
  #8  
The Golden Boy 
Extraordinary Magnitude
 
The Golden Boy's Avatar
 
Join Date: Aug 2009
Location: Waukesha WI
Posts: 11,541

Bikes: 1977 Trek TX700; 1978/79 Trek 736; 1984 Specialized Stumpjumper Sport; 1984 Schwinn Voyageur SP; 1985 Trek 620; 1985 Trek 720; 1986 Trek 400 Elance; 1987 Schwinn High Sierra; 1990 Miyata 1000LT

Mentioned: 73 Post(s)
Tagged: 0 Thread(s)
Quoted: 1789 Post(s)
Liked 101 Times in 82 Posts
I was actually searching for something and stumbled across this thread- and this is EXACTLY a question I was going to start a thread about.

30T is the answer I was looking for- I'm at 30 and was considering going down to 28.

Thanks everyone!
__________________
*Recipient of the 2006 Time Magazine "Person Of The Year" Award*

Commence to jigglin’ huh?!?!

"But hey, always love to hear from opinionated amateurs." -says some guy to Mr. Marshall.
The Golden Boy is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
wphamilton
Bicycle Mechanics
7
05-19-12 06:51 PM
spunkyj
Bicycle Mechanics
12
09-18-11 05:39 PM
thook
Bicycle Mechanics
7
04-22-11 09:13 PM
rrotello
Classic & Vintage
15
04-02-11 03:28 PM
Geoff Gardner
Road Cycling
0
08-18-10 07:35 AM

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

Copyright © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.