Retrobike Forum Index

It is currently Wed Dec 07, 2016 11:53 am

* Login   * Register * Search  * FAQ



Post new topic Reply to topic  [ 8 posts ] 
Author Message
PostPosted: Thu Jun 03, 2010 11:03 am 
Retro Guru

Joined: Mon Apr 03, 2006 5:11 pm
Posts: 1103
My bike is a 1996 Giant Peloton with RSX 7spd STI compact gearing.

It was supplied with a an 11-24(I think) cassette and a triple front 26/36/46 chainrings.

The cassette and chain were well shot, but the chainrings are still OK.

I couldn't get hold of a 11-24 7spd cassette for love nor money - seems they weren't used much and have long been discontinued.

I saw 13-23 cassettes but I really wanted to keep the 11T for a high gear.

So I ended up with a 11-28 cassette.

Now this makes the triple redundant, and also I feel the top gear 46:11 is pretty low!

What top gear size do road bikes normally have? I know I'm suppose to be spinning but is my 46:11 low?

I can't find a big chain rings to fit my compact cranks - are there any out there?

Will I be better off with a larger double set up (I cant see me ever using the granny ring with that 28T)? If I'm buying a bigger double - should i get a 13-23 cassette for a closer spread of gears?

Being new to road bikes I have no idea what the norm or best option is!

Thanks :)


Top
 Profile  
 
 Post subject:
PostPosted: Thu Jun 03, 2010 11:59 am 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
Posts: 8209
Location: New Forest, UK
Firstly try www.roseversand.de for many more 7s cassettes. They are OK to deal with. They even do single cogs!!!! Madison just cannot be bothered to import much into the UK... :evil:

For a choice of chainrings try www.spacycles.co.uk

From what's available in the UK, I made an 11-21 cassette out of a 13-21 and an 11-28, and that works quite nicely.

For a road bike then you need something like a range from 107" down to around 45". Take your wheel diameter and multiply by the gear ratio. 46:11 sounds fine to me. Unless you have HUGE legs then much over 107" (around 4:1) is a bit of a dick-measuring contest and only useful over 30mph.


Top
 Profile  
 
 Post subject:
PostPosted: Thu Jun 03, 2010 3:57 pm 
South East AEC
South East AEC
User avatar

Joined: Wed Oct 03, 2007 3:39 pm
Posts: 3882
I have a nearly new 7speed close ratio cassette in my parts box, make me an offer !!


Top
 Profile  
 
 Post subject:
PostPosted: Thu Jun 03, 2010 4:05 pm 
Retro Guru

Joined: Mon Apr 03, 2006 5:11 pm
Posts: 1103
TheGreenRabbit wrote:
I have a nearly new 7speed close ratio cassette in my parts box, make me an offer !!


What are the ratios?


Top
 Profile  
 
 Post subject:
PostPosted: Fri Jun 04, 2010 9:54 am 
Retro Guru

Joined: Wed May 27, 2009 10:41 am
Posts: 638
Spa Cycles have 7sp 11-24 cassettes: http://www.spacycles.co.uk/products.php?plid=m2b0s150p262


Top
 Profile  
 
 Post subject:
PostPosted: Fri Jun 04, 2010 11:07 am 
Gold Trader
Gold Trader

Joined: Sun Jun 22, 2008 1:38 pm
Posts: 1439
Location: OZ
Your RSX compact is 110bcd- lots of bigger rings in that size.

If it were me, i'd get a used 39/53 c/set off ebay- 53/11 is plenty big!!

Andy


Top
 Profile  
 
 Post subject:
PostPosted: Fri Jun 04, 2010 1:16 pm 
Old School Grand Master
User avatar

Joined: Tue Nov 18, 2008 10:49 am
Posts: 4061
Location: A veritable floating palace
46/11 is not a low gear. If you are spinning out at that ratio, well, chapeau.

If you aren't, perhaps you're pushing too hard. Dance on those pedals!

You'll miss your knees when they're gone. :(


Top
 Profile  
 
 Post subject:
PostPosted: Fri Jun 04, 2010 2:33 pm 
Retro Guru

Joined: Mon Apr 03, 2006 5:11 pm
Posts: 1103
chris667 wrote:
46/11 is not a low gear. If you are spinning out at that ratio, well, chapeau.

If you aren't, perhaps you're pushing too hard. Dance on those pedals!

You'll miss your knees when they're gone. :(


I think technique is my problem!

I will buy an 11-24 cassette :)


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 8 posts ] 

All times are UTC [ DST ]


Who is online

Users browsing this forum: christram and 15 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  

About Us

Follow Retrobike

Other cool stuff

All content © 2005-2015 Retrobike unless otherwise stated.
Cookies Policy.
bikedeals - the best bike deals in one place
FatCOGS - Fat Chance Owner's Group

Powered by phpBB® Forum Software © phpBB Group