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

Best Black Friday E-Bike Deals 2024 | Up to $1,700 in Savings

New: Take Part in the November Giveaway: Starts November 18th


42mm Inside Diameter Head Tube
#1
Hi Everyone.
New to the forum.
I have an older dual suspension mountain bike, a giant ATX900. It has a weird head tube inside diameter of 42mm, which puts it somewhere in between the old 1 1/4" standard and the 1 1/2" standard.
Anyone know what type of head set was intended for this diameter head tube?
Cheers
Cam
  Reply
#2
You need a 1 1/8 headset. Google "head tube diameter" One helpful result: http://en.wikipedia.org/wiki/Head_tube. Also, just Google "42mm headset." http://www.ebay.com/sch/i.html?_kw=42mm+headset
  Reply
#3
Thanks.

I've been able to figure out it is a now obsolete Microtech Integrated head set that never became standard.

It used a 1 1/8 steerer with bearings press fit directly into the frame.

The closest modern standard is a Zero Stack headset with 44mm head tube inside diameter.

So my options are ream the head tube out to 44mm or get a machine shop to make a custom reducer.

Anyone know anything about reaming? For example, how thin could I make the walls of the head tube before I weaken them so much that they fail?
  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
29,735
05-19-2012, 03:14 AM
Last Post: GeorgeET

Forum Jump:

[-]
10 Latest Posts
Second wheelset for ebike.
Today 01:41 AM
Moving in Style: Beyond Regular Transpor...
Yesterday 09:23 PM
Tire Sizing (Or How to Buy A Tire)
Yesterday 12:36 PM
The Roaming Radrunner Vlog 1 Why ride ...
Yesterday 09:17 AM
Recording Bike Rides
11-20-2024 01:37 AM
Ketone Ester $$$
11-19-2024 01:04 AM
Trek domane tyre
11-18-2024 01:58 PM
Old fossil buys Ebike
11-17-2024 06:39 AM
Bike bus
11-17-2024 12:14 AM
Humber "Eiffel Safety" bike 1800s
11-16-2024 03:05 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. Jesper
22 posts
no avatar 2. enkei
19 posts
no avatar 3. GirishH
14 posts
no avatar 4. Flowrider
11 posts
no avatar 5. ReapThaWhirlwind
11 posts