Simplex prestige gearing
04-30-15 | 11:53 AM
#1
Thread Starter
Senior Member
Joined: Sep 2012
Posts: 3,699
Likes: 581
From: Toronto, ON, Canada
Simplex prestige gearing
I have a stronglight 93 crank with a 52 outer chainring. I am trying to change the inner 45 to something smaller like a 40-42 or even smaller. I have a front simplex sj102a derailleur. 122bcd
I have a 1972 simplex prestige rear derailleur with either 13-24 or 14-24 6 speed freewheel (I can't remember). I am thinking of switching this to something with a lower low gear.
I'm hoping to make my gearing more conducive to the hills around here. What are limits on lowest gearing I can put on? 40/52 and a 13-26? Lower?
I have a 1972 simplex prestige rear derailleur with either 13-24 or 14-24 6 speed freewheel (I can't remember). I am thinking of switching this to something with a lower low gear.
I'm hoping to make my gearing more conducive to the hills around here. What are limits on lowest gearing I can put on? 40/52 and a 13-26? Lower?
Last edited by Narhay; 04-30-15 at 12:18 PM.
04-30-15 | 12:05 PM
#2
Senior Member
Joined: Feb 2013
Posts: 15,369
Likes: 4,391
From: Alta California
chainwheels for the 93 nominally go down to 38T in the mfr's literature. some enthusiasts report finding 37T's.
the prestige rear mech is rated at a large cog limit of 28T and a wrap of 28T.
hope this helps you a bit.
the prestige rear mech is rated at a large cog limit of 28T and a wrap of 28T.
hope this helps you a bit.
04-30-15 | 12:10 PM
#3
Your post is cofusing because taller means higher gearing, not lower. The cog is bigger, but the gear ratio is lower.
04-30-15 | 12:20 PM
#4
Thread Starter
Senior Member
Joined: Sep 2012
Posts: 3,699
Likes: 581
From: Toronto, ON, Canada
28t chain wrap...
52-40 + 28-14 = 26t.
Ok, apparently I learned what chain wrap is.
Last edited by Narhay; 04-30-15 at 12:27 PM.
04-30-15 | 12:50 PM
#5
feros ferio
Joined: Jul 2000
Posts: 22,400
Likes: 1,866
From: www.ci.encinitas.ca.us
Bikes: 1959 Capo Modell Campagnolo; 1960 Capo Sieger (2); 1962 Carlton Franco Suisse; 1970 Peugeot UO-8; 1982 Bianchi Campione d'Italia; 1988 Schwinn Project KOM-10;
Someone please correct me, but I believe those 38T 122mm BCD chainrings are exceedingly rare and very much in demand among Stronglight fans.
__________________
"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
04-30-15 | 12:53 PM
#6
feros ferio
Joined: Jul 2000
Posts: 22,400
Likes: 1,866
From: www.ci.encinitas.ca.us
Bikes: 1959 Capo Modell Campagnolo; 1960 Capo Sieger (2); 1962 Carlton Franco Suisse; 1970 Peugeot UO-8; 1982 Bianchi Campione d'Italia; 1988 Schwinn Project KOM-10;
One other consideration: Assuming a 5-speed freewheel, 52-40/14-28 provides a superb 1.5-step gear ratio progression and was extremely popular in its day. 50-38 would take you down about as low as your rear derailleur can go, while still providing a great set of ratios, a reasonable top gear, and a very easy-to-find 5-speed freewheel.
__________________
"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
04-30-15 | 01:03 PM
#7
Senior Member
Joined: Dec 2005
Posts: 18,787
Likes: 11,528
xxcycle.com in France stocks them semi-regularly (they're not showing any right now). They don't quite have the same vintage look as the rings that came on a mod. 93 crankset, but they are 122bcd and 38t.
04-30-15 | 01:28 PM
#8
Thread Starter
Senior Member
Joined: Sep 2012
Posts: 3,699
Likes: 581
From: Toronto, ON, Canada
I need to figure out which derailleur it is. I thought prestige but perhaps it is criterium? It is identical to this one with the red plugs.
Those chain wrap and max cog sizes have to be wrong. 34T?
VeloBase.com - Component: Simplex Criterium
Those chain wrap and max cog sizes have to be wrong. 34T?
VeloBase.com - Component: Simplex Criterium
Last edited by Narhay; 04-30-15 at 01:42 PM.
04-30-15 | 03:00 PM
#9
Old fart
Joined: Nov 2004
Posts: 26,372
Likes: 5,289
From: Appleton WI
Bikes: Several, mostly not name brands.
122 BCD Conventional Chainring, 37 Teeth - Red Clover Components
04-30-15 | 03:57 PM
#10
Senior Member
Joined: Apr 2005
Posts: 16,748
Likes: 138
From: Wherever
You can tell by a couple of things. The Criterium has chromed steel plates added to the body. And the pulley cage plates are solid rather than stamped and hollow-ish looking.
I need to figure out which derailleur it is. I thought prestige but perhaps it is criterium? It is identical to this one with the red plugs.
Those chain wrap and max cog sizes have to be wrong. 34T?
VeloBase.com - Component: Simplex Criterium
Those chain wrap and max cog sizes have to be wrong. 34T?
VeloBase.com - Component: Simplex Criterium
04-30-15 | 05:13 PM
#11
If I own it, I ride it
Joined: Nov 2005
Posts: 5,685
Likes: 820
From: Cardinal Country
Bikes: Lejeune(14), Raleigh, Raysport, Jan De Reus, Gazelle, Masi, B. Carré(4), Springfield, Greg Lemond, Andre Bertin, Schwinn Paramount
Yup. Took me a year plus to get mine.
05-01-15 | 09:37 AM
#13
You can use Model 57 Super Competition rings if you drill them out for 10 mm bolts and countersink.
05-01-15 | 11:47 AM
#14
Senior Member
Joined: Jun 2014
Posts: 462
Likes: 13
From: Rat City, WA
Bikes: Peugeot Course, Motobecane Super Mirage(RIP), Peugeot PKN10e Motobecane Grand Touring
I'm running a Simplex 410 short/medium? cage, on a triple with a 14-28 freewheel.
Works pretty good. But I do have a 410 long cage on the bench right now I intend
put on.
Speaking of chain wrap, check this out.
Small gear to small gear. 34-14, not recommend
Works pretty good. But I do have a 410 long cage on the bench right now I intend
put on.
Speaking of chain wrap, check this out.
Small gear to small gear. 34-14, not recommend
05-01-15 | 12:02 PM
#15
Senior Member
Joined: Jun 2014
Posts: 462
Likes: 13
From: Rat City, WA
Bikes: Peugeot Course, Motobecane Super Mirage(RIP), Peugeot PKN10e Motobecane Grand Touring
Simplex 410 long cage on a hanger. as came from France.
14-28 freewheel 52/40 crank.
Narhay
This is an old photo but, there is the ring I'd like to send you.
14-28 freewheel 52/40 crank.
Narhay
This is an old photo but, there is the ring I'd like to send you.
Thread
Thread Starter
Forum
Replies
Last Post
Gdando
Classic & Vintage
9
02-01-14 11:30 AM
