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

New: Take Part in the June Giveaway to Win the Kazam Buddi 20" Aluminum Trailer Bike


Fork problem
#1
Hello, i want to convert my Centurion Ironman Expert into a time trial bike. its a 50cm frame. the problem is i have no idea what length steerer tube i need since i don't know how much thread is actually on the fork. I'm planning on getting a 160mm carbon threaded fork off amazon. do you think it'll work?
  Reply
#2
Considering just the radically different geometry of TT and road bikes and being very blunt: This will be impossible.
And here is why: The best you can achieve is a compromise between a road and a fully aero position. The main problem is that the weight distribution will radically change if you go to a really agressive aero position ( seat angle > 78° etc), making the handling very different, probably even dangerous. You can ameliorate this effect a bit (I guess) by changing the fork geometry (trail and rake), but ultimately this will remain a compromise. Check with an experienced frame builder who knows about stuff like that. Note that this is (in my opinion) the sole reason to change the fork (other than the old one being broken).

Usually a moderate Aero position can be achieved by putting on some aero bars, moving the saddle forward a couple of cm, lowering the handle bar and calling it a day (well, you'll have to play around with all the settings for some rides, eg. trying to clamp the aero bars under the road bar to go lower). The full conversion requires a huge investment (brake levers, base pursuit bar, aero bar, shifters, fork) and will (I fear) not result in a bike that is really a TT bike, but rather have the high risk of resulting in a difficult (maybe dangerous) to ride bike.
  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post

Forum Jump:

[-]
10 Latest Posts
Would you use WD-40 for cleaning and/or ...
Today 09:57 PM
Freehub pawls or ratchet : Grease or oil...
Today 05:11 PM
Anybody watch on YouTube Global Mountain...
Today 05:03 PM
Bianchi Oltre Pro Garmin Mount
Today 10:57 AM
How to keep your bicycle safe?
Yesterday 03:20 PM
1998 Cannondale H300 Hybrid
Yesterday 03:16 PM
1994 Trek 730
Yesterday 03:15 PM
Community Discussion Cycling Myths
Yesterday 03:01 PM
Sora, shift gear cable stuck (wrongly in...
Yesterday 12:12 PM
Man on e-bicycle, Fire, pregnant woman!
Yesterday 09:15 AM

[-]
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. Jesper
30 posts
no avatar 2. Flowrider
24 posts
no avatar 3. meamoantonio
21 posts
no avatar 4. GirishH
18 posts
no avatar 5. enkei
18 posts