Welcome, Guest. Please Login or Register

Author Topic: 18 inch tube in 17 inch tyre  (Read 633 times)

0 Members and 1 Guest are viewing this topic.


  • Guest
18 inch tube in 17 inch tyre
« on: February 02, 2006, 08:18:47 am »
Hi there boys and girls, anybody doing this? Any issues I should be aware off?

I cant seem to find 17 inch tubes, can only get 21 and 18.

Offline sidetrack

18 inch tube in 17 inch tyre
« Reply #1 on: February 02, 2006, 09:17:37 am »
I'll think you'll be ok as people have used 21 inch tubes for 18 rears.
Little by little, one travels far

J.R.R Tolkien
Ride reports :
http://www.wilddog.za.net/forum/index.php?topic=134175.0 Penge's pass and the Old Forest http://www.wilddog.za.net/forum/index.php?topic=9421.0 - Orange Atlantic adventure http://www.wilddog.za.net/forum/index.php?topic=7514.0 - 805 km day trip http://www.wilddog.za.net/forum/index.php?topic=20260.0 - East Cape Bash http://www.wilddog.za.net/forum/index.php?topic=70199.0 - Two KTM thumpers head north

Offline AfricaOffroad

  • Senior Member
  • ***
  • Bike: BMW (all models)
    Location: Kwazulu Natal
  • Posts: 1,245
  • Thanked: 48 times
18 inch tube in 17 inch tyre
« Reply #2 on: February 02, 2006, 09:35:58 am »
In an emergency this is fine.

You may find however that folds in the bigger tube could cause excessive internal chaffing, leading to unnecessarty punctures
2018 KTM 1290 T
2018 Husqvarna TE 300

Offline LiveInTheOutdoors

  • Senior Member
  • ***
  • Posts: 1,207
    • http://tigerr.smugmug.com
18 inch tube in 17 inch tyre
« Reply #3 on: February 02, 2006, 11:32:18 am »
AOR is correct, as is Digital Dan. I ran out of tubes on my 18inch rear tube when I had the flattie, on the morning of going to meet up with the Vaalie bunch. I stuffed a 21 incher in there, and it was fine. I did speeds up to 185 on the Katoom, with crutches and a pillion on the back, several hundred kays that day.

However, the next day it was flat again. That chafing wasnt good.

If you want that size tube, BMW dealers are your answer. All their rear tyres are 17inchers...
very minute is a chance to turn it all around - Vanilla Sky

>Mav... started gym. Officially at 95kg....<