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In 1998 I bought a Triumph Herald 13/60, here you can read about it's restoration and share in a few photo's from it's travels. Please feel free to leave comments to any of the posts, of even email me if you want to.

Wednesday, February 17, 2016

Wheel Stud Upgrade

After posting a question on the TSSC Forum recently about the appropriate offset for replacement alloy wheels for my Herald, the thread soon went on to the size of the wheel studs which are fitted to many of our cars, and that it is advisable to replace them with something a little more substantial. You can see the original thread here:  http://tinyurl.com/zf6p8yc  

I decided to take the advice of Forum members Clive, AidanT & Pete Lewis (thanks guys) and track down a suitable stud. A quick Google and I soon found reference to those fitted on the Freelander to be a good option, an M12 thread so substantially bigger than the 3/8” originals and around 50% longer. So another quick search for Part No. CLP9037L and I had a wide choice of suppliers, but I ended up using www.paddockspares.com, apart from being the cheapest on the web, they had the correct bevelled head allowing them to be a straight swap. The image below shows the difference in size, the Herald ones look tiny in comparison.

Comparison of old and new wheel stud
Anyone that has replaced wheel studs before will know that new original ones can be removed and refitted without dismantling the hubs, unfortunately that’s not the case with these ones due to their length, so if you’re thinking of doing it set yourself a morning aside.

The fronts are pretty simple, I’ll assume you know how to remove the disc & hub (if not refer to your WSM) then undo the 4 bolts securing the brake disc to the hub and separate. The old studs should come out pretty easy, either use a press if available or some firm but not overly hard taps with a hammer should see them drop out, whichever method you use be careful not to bend the hub. If they are reluctant use penetrating oil and/or heat to encourage them. Insert the new studs, press in or pull in using washers or something else as a spacer and a nut.

New Studs Fitted to Hub
Front Hub Back Together
The rears are a little trickier as separating the hub is impossible unless you have the correct tool. If you do have a suitable puller then great, but if like me you don’t then all is not lost! Slacken off the adjuster and remove the drum and brake shoes.  I drilled out a ¾” access hole in the back plate (thanks Clive for this tip) and fed the stud through (Image 4), then pulled the stud into place using spare M12 nut and oversized nut as a spacer. I then used a blanking grommet to close off the hole in the back plate.

New Stud Inserted Through Access Hole
New Studs pulled into position
As these studs are considerably longer, if using closed type nuts, do ensure they are not bottoming out otherwise your wheels won’t be tight!

Image below is of the new alloys safely secured on my Herald.

Wheels Safely Secured

2 comments:

Matt Skelton said...

What wheel spacer did you use I have some Dolly/sprint wheels to fit to my Herald.

Darren Groves said...

I didn't use wheel spacers, there was no need