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

Updating drivetrain -- suggestions?

Search
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.

Updating drivetrain -- suggestions?

Thread Tools
 
Search this Thread
 
Old 10-26-14 | 07:07 PM
  #1  
Johnny Rebel's Avatar
Thread Starter
Senior Member
 
Joined: Mar 2011
Posts: 255
Likes: 1
From: Northeastern USA

Bikes: 2007 Bianchi Castro Valley, 1985 Specialized Sequoia

Updating drivetrain -- suggestions?

Hi folks,

Well, I wore out the original rear wheel (5 speed freewheel) on my '85 Specialized Sequoia. I had the rear triangle spread to 130mm spacing and got a nice sturdy new wheel. My barcons can shift up to 8 gears, so it's time to get a new cassette and now I figure I might as well get a new chain (it's stretched) and some new chainrings. The Sequoia came with 50/46/30 chainring combo I actually enjoyed. I like a wide range as I live near the many steep and prolonged hills outside of Silicon Valley. A 1:1 low gear sees more use than I'd like to admit. But when commuting (34 miles round trip) it's flat and dialing in cruising gears in the middle of the cassette is nice. Rear derailleur is Deerhead so it can go fairly wide, I believe.

So, what would be your advice for me, as far as spec'ing out a nice intuitive wide 3x8 cassette/chainring combo to gracefully meet my needs?

oh, and I'm poor, well at least as far as what my wife I'll allow me to spend....
Johnny Rebel is offline  
Reply
Old 10-26-14 | 07:17 PM
  #2  
Barrettscv's Avatar
Have bike, will travel
 
Joined: Feb 2006
Posts: 12,286
Likes: 317
From: Lake Geneva, WI

Bikes: Ridley Helium SLX, Canyon Endurance SL, De Rosa Professional, Eddy Merckx Corsa Extra, Schwinn Paramount (1 painted, 1 chrome), Peugeot PX10, Serotta Nova X, Simoncini Cyclocross Special, Raleigh Roker, Pedal Force CG2 and CX2

I'd use the 13-26 eight speed cassette: https://m.ebay.com/itm/291262259324 If you want a wide range for hilly terrain, consider this 48, 38 & 28 crankset: https://m.ebay.com/itm/390954672470?nav=SEARCH .

My 3x8 divetrain uses multiple cassettes depending on the steepness of the ride. I'll use a 12-21 at home where it's pancake flat, a 13-26 for general riding and a 12-28 for hilly century rides. The bike has a 52,42 & 30 chainring set.




I also use a 48, 36 & 26 chainring set with a 12-24 cogsets on this bike;

__________________
When I ride my bike I feel free and happy and strong. I'm liberated from the usual nonsense of day to day life. Solid, dependable, silent, my bike is my horse, my fighter jet, my island, my friend. Together we will conquer that hill and thereafter the world.

Last edited by Barrettscv; 10-26-14 at 07:42 PM.
Barrettscv is offline  
Reply
Old 10-26-14 | 08:03 PM
  #3  
ThermionicScott's Avatar
Senior Member
10 Anniversary
 
Joined: Aug 2011
Posts: 22,682
Likes: 2,640
From: CID

Bikes: 1991 Bianchi Eros, 1964 Armstrong, 1988 Diamondback Ascent, 1988 Bianchi Premio, 1987 Bianchi Sport SX, 1980s Raleigh mixte (hers), All-City Space Horse (hers)

The 13-26T 8-speed gets my vote as well -- with 700x25 tires, you're looking at a range of 47-94" on the middle ring. Plenty for cruising in the flatlands and some mild hills.
ThermionicScott is offline  
Reply
Old 10-26-14 | 08:46 PM
  #4  
Chrome Molly's Avatar
Senior Member
 
Joined: Jan 2012
Posts: 3,190
Likes: 17
From: Forksbent, MN

Bikes: Yes

To have many flat options while retaining big climb ability, what I would do with the 50/46/30 is try to find a cassette that allows decent half stepping across the larger two rings. Have a cassette something like 12-28 or 12-30 so you can preserve your nearly 1:1 climbing gearing on the little ring.

I find with a half step plus granny you have lots of options:
You can Half step when you need that perfect gear into a steady wind
Whole step when the terrain changes and you need a big change quickly
And, the bigger gaps on the rear cassette are not a nuisance when on the 30 ring spinning up a steep hill.
Chrome Molly is offline  
Reply
Old 10-27-14 | 04:57 AM
  #5  
rccardr's Avatar
aka: Dr. Cannondale
Titanium Club Membership
Sheldon Brown Memorial - Titanium
15 Anniversary
Active Streak: 30 Days
 
Joined: Jul 2009
Posts: 8,628
Likes: 6,160
I like a 12/28 with a 50/34/24 combo. Hard to spin out, good climbing gears, lots of options.
If you own a couple of cassettes already, it's easy to mix and match the middle gears to suit the ones you use the most.
__________________
Hard at work in the Secret Underground Laboratory...
rccardr is offline  
Reply
Old 10-27-14 | 02:47 PM
  #6  
old's'cool's Avatar
curmudgineer
 
Joined: Dec 2009
Posts: 4,417
Likes: 113
From: Chicago SW burbs

Bikes: 2 many 2 fit here

Originally Posted by Chrome Molly
To have many flat options while retaining big climb ability, what I would do with the 50/46/30 is try to find a cassette that allows decent half stepping across the larger two rings. Have a cassette something like 12-28 or 12-30 so you can preserve your nearly 1:1 climbing gearing on the little ring.

I find with a half step plus granny you have lots of options:
You can Half step when you need that perfect gear into a steady wind
Whole step when the terrain changes and you need a big change quickly
And, the bigger gaps on the rear cassette are not a nuisance when on the 30 ring spinning up a steep hill.
My thoughts exactly.
old's'cool is offline  
Reply
Old 10-30-14 | 11:31 AM
  #7  
Johnny Rebel's Avatar
Thread Starter
Senior Member
 
Joined: Mar 2011
Posts: 255
Likes: 1
From: Northeastern USA

Bikes: 2007 Bianchi Castro Valley, 1985 Specialized Sequoia

Originally Posted by Chrome Molly
To have many flat options while retaining big climb ability, what I would do with the 50/46/30 is try to find a cassette that allows decent half stepping across the larger two rings. Have a cassette something like 12-28 or 12-30 so you can preserve your nearly 1:1 climbing gearing on the little ring.

I find with a half step plus granny you have lots of options:
You can Half step when you need that perfect gear into a steady wind
Whole step when the terrain changes and you need a big change quickly
And, the bigger gaps on the rear cassette are not a nuisance when on the 30 ring spinning up a steep hill.
I ended up going with this option, only slightly tweaked to 48-44-28 up front and 11-30 in the rear. Since most of my miles these days are flat commuting (at least 100+ miles per week) , with only weekend forays into the hills, this gives me many small jumps in the cruising range, and I only need the small ring for those dastardly steep hills around here.

Now trying to decide on new tires.... 700x32 is my max size, I believe.....
Johnny Rebel is offline  
Reply
Old 10-30-14 | 11:46 AM
  #8  
Bill Kapaun's Avatar
Really Old Senior Member
15 Anniversary
 
Joined: Feb 2007
Posts: 14,536
Likes: 1,797
From: Mid Willamette Valley, Orygun

Bikes: 87 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds. 2019 Giant Explore E+3

I would have simply gone to 9 speed with a lot more cassette options than 8.
Cassettes are about the same price, although the chain will be a few $ more.
Bill Kapaun is offline  
Reply
Old 10-31-14 | 01:56 PM
  #9  
Johnny Rebel's Avatar
Thread Starter
Senior Member
 
Joined: Mar 2011
Posts: 255
Likes: 1
From: Northeastern USA

Bikes: 2007 Bianchi Castro Valley, 1985 Specialized Sequoia

Originally Posted by Bill Kapaun
I would have simply gone to 9 speed with a lot more cassette options than 8.
Cassettes are about the same price, although the chain will be a few $ more.
Good point, but my shifters will only handle 8 speeds, even though they're friction
Johnny Rebel is offline  
Reply
Old 10-31-14 | 02:02 PM
  #10  
Bill Kapaun's Avatar
Really Old Senior Member
15 Anniversary
 
Joined: Feb 2007
Posts: 14,536
Likes: 1,797
From: Mid Willamette Valley, Orygun

Bikes: 87 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds. 2019 Giant Explore E+3

Originally Posted by Johnny Rebel
Good point, but my shifters will only handle 8 speeds, even though they're friction
About 1mm difference?
It's kind of hard to believe that would cause a problem.
Bill Kapaun is offline  
Reply
Old 10-31-14 | 04:30 PM
  #11  
No longer active
 
Joined: May 2012
Posts: 1,001
Likes: 7
13 - 26 gets my vote as well, assuming you'll be sticking with an 8sp triple.

Last edited by DIMcyclist; 10-31-14 at 04:31 PM. Reason: Grammar & punctuation.
DIMcyclist is offline  
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Piff
Classic & Vintage
22
02-26-19 12:33 PM
budfan08
Road Cycling
51
03-17-17 08:56 AM
oldskoolcat
Road Cycling
8
08-23-12 01:19 PM
ModeratedUser150120149
Bicycle Mechanics
10
06-10-11 09:26 AM
nsandberg
Road Cycling
2
07-15-10 10:41 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.