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

New: Take part in the July Giveaway for VTUVIA SN100 Camouflage Fat Tire E-Bike $1679


Advice needed..
#1
I have a GT Aggressor 3 which I really like but is getting worn out. Want to keep this frame and have the chance to buy a Scott g zero fx 2 which has a broken frame. Is there any point trying to build a bike from the 2? Budget and limited knowledge are big factors. Is there any chance the likes of forks and cogs etc are compatible? Thanks.
  Reply
#2
Most things on a bicycle are fairly standard and can be swapped between frames, but there are a few things you need to watch for:

Brakes, obviously you can't fit disk brakes to a frame without disc brake mounts or V-brakes to a frame without V-brake bosses.

Forks come with different diameter steerer tubes and different crown heights, threaded and un-threaded. Most MTBs made after about 1995 have unthreaded 1 1/8" steerer tubes, but you need forks with a similar axle to crown height, if you wish to maintain a similar steering geometry, so if your exchanging suspension forks they should have a similar amount of travel.

Seat posts come in a wide variety of diameters and obviously the seat post has to match the frame.

Bottom brackets have two different threads, English and Italian, nearly all are English now, and two different widths, 73mm and 68mm, most are 68 and modern external bottom brackets can fit either and are adjusted by means of shims.
  Reply
#3
(10-29-2010, 10:11 AM)xerxes Wrote:  Most things on a bicycle are fairly standard and can be swapped between frames, but there are a few things you need to watch for:

Brakes, obviously you can't fit disk brakes to a frame without disc brake mounts or V-brakes to a frame without V-brake bosses.

Forks come with different diameter steerer tubes and different crown heights, threaded and un-threaded. Most MTBs made after about 1995 have unthreaded 1 1/8" steerer tubes, but you need forks with a similar axle to crown height, if you wish to maintain a similar steering geometry, so if your exchanging suspension forks they should have a similar amount of travel.

Seat posts come in a wide variety of diameters and obviously the seat post has to match the frame.

Bottom brackets have two different threads, English and Italian, nearly all are English now, and two different widths, 73mm and 68mm, most are 68 and modern external bottom brackets can fit either and are adjusted by means of shims.

Much appreciated xerxes. It's the forks I was most worried about, just going to get the bike now and hope for best. Brilliant news about bottom bracket, I never knew you could adjust them like that. Frame has mounting points for discs but think the Scott has V brakes like the GT. Going to be an interesting first project. Thanks again for reply.
  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
8,086
11-25-2010, 01:10 PM
Last Post: X-RAY

Forum Jump:

[-]
10 Latest Posts
Jumps a Gear
Yesterday 07:14 PM
Rode my First Double Century in June
08-08-2022 11:42 PM
2022 road cycling season
08-08-2022 04:03 PM
Cycling photos while on holiday
08-08-2022 01:17 PM
Vairas vintage bicycle brand
08-08-2022 11:45 AM
New user
08-08-2022 11:38 AM
Harvest Rush Gravel Grinder! $1,000 cash...
08-08-2022 09:15 AM
Lock ring clearance
08-07-2022 09:42 PM
New Stator For My Ride1up Core 5
08-07-2022 03:56 PM
Why should I buy an e-bike?
08-07-2022 02:07 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. ichitan
22 posts
no avatar 2. Jesper
21 posts
no avatar 3. ReapThaWhirlwind
18 posts
no avatar 4. JamesKim
11 posts
no avatar 5. dinh thaihoang
8 posts