Have questions or want to discuss cycling? Join Now or Sign In to participate in the BikeRide community.

New: Take Part in the March Giveaway: Coming Soon 3/24


Bike Novice - Need New Cassette
#1
Hello all,

A quick Google search popped up this website and you guys all looked to be very friendly. So, I have a Giant bike, about 7 years old, and the cassette and chain are both... bad. Really bad. Rusted, gears worn off, stiff link... it's bad. I already bought a new chain at the local bike shop (SRAM PC 850) but then realized I needed a new cassette too.

So, buying a new cassette looks to be much more difficult than chains. My bike is a 2004 Giant Rincon.
Image 1
Image 2

Do you guys have recommendations on what cassette I should get? I need the front three gears and the rear-derailer at least, but should probably replace all gears since I've heard cassettes and chains should be done at the same time.

Thanks,
David
  Reply
#2
Hi David;

Based on this:
http://www.bikepedia.com/quickbike/bikespecs.aspx?Year=2004&Brand=Giant&Model=Rincon&Type=bike

I would get a SRAM 8 speed cassette; one of these:
http://www.amazon.com/PG830-Bicycle-Cassette-8-Speed-11-28T/dp/B000NNR8ZY/

This rear derailleur:
http://www.amazon.com/PG830-Bicycle-Cassette-8-Speed-11-28T/dp/B000NNR8ZY/

Crankset:
http://www.amazon.com/Shimano-Tourney-FC-M131-Crankset-42-34-24/dp/B000F5HXHI/

Techdoc:
http://techdocs.shimano.com/media/techdocs/content/cycle/SI/FC/SI_1LX0A/SI-1LX0A-003-00-Eng_v1_m56577569830758324.pdf

And you probably need a new bottom bracket (aka BB)
Nigel
  Reply
#3
Well I think I'll go with the 11-28 cassette since I *never* find myself using the largest gear in the rear. I grabbed this derailleur and the crankset you provided a link to above. The bottom bracket though - how do I know which one to get? Bikepedia doesn't seem to list mine. If I take my bike apart, will it say on the current one? And why do I need one? Is it (likely) not compatible with the new crankset, or will it be worn down? I have noticed a solid click once per crank revolution for the past year or so when pedaling hard and often thought it would be BB (not that I had idea it was called that at the time lol).

Also, sorry about the delay. I set the thread for instant email notification but I guess it got stopped by spam filters, so I thought no one ever replied.

Thanks!
David
  Reply
#4
HI David;

The crankset I listed needs a square taper BB; your bike uses a 68mm diameter BB; the final thing you need is the BB length, according the tech doc (last link in my previous post) you need a BB with a 122.5mm length. So you need a BB that is 68 x 122.5 with a square taper. The Shimano UN26 is about the cheapest one you'll find. As you go higher up Shimano's line the number will increase; thus a UN55 is better than a UN26.

References:
http://sheldonbrown.com/gloss_bo-z.html#bottom
http://sheldonbrown.com/bbsize.html

The once per rev noise could be the BB (most likely), the pedals, or something else.
Nigel
  Reply
#5
Great. Thanks for the info!

Shopping cart consists of:
Shimano UN55 122.5x68
SRAM PG830 8speed 11-28
Shimano RD-M410 Alivio SGS
Shimano Tourney FC-M131 170mm 42 - 34 - 24
  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
6,466
08-28-2010, 03:20 PM
Last Post: GeorgeET

Forum Jump:

[-]
10 Latest Posts
What tools have you bought recently?
Yesterday 06:57 PM
Santini fluted frame
Yesterday 06:47 PM
Expensive bikes with crappy wheels
Yesterday 10:15 AM
Where are you from and What is your favo...
03-27-2024 11:43 PM
2007 Trek Pilot S.P.A. 5.2
03-27-2024 07:06 PM
2010 Specialized Hardrock
03-26-2024 09:16 PM
1990 Specialized Rockhopper How to Fluff...
03-25-2024 07:05 PM
Thread busted on right pedal crank
03-24-2024 08:52 PM
Trek domane tyre
03-24-2024 05:48 PM
Modern rims crack at spoke holes
03-24-2024 05:32 PM

[-]
Join BikeRide on Strava
Feel free to join if you are on Strava: www.strava.com/clubs/bikeridecom

[-]
Top 5 Posters This Month
no avatar 1. Painkiller
21 posts
no avatar 2. ReapThaWhirlwind
16 posts
no avatar 3. meamoantonio
15 posts
no avatar 4. Jesper
15 posts
no avatar 5. GirishH
15 posts