All Defender Wheel Studs, with the exception of FRC7577, are all the same length.
Even the 'Wolf' HS (XD) vehicle has the standard length Wheel Studs fitted.
The effective length of the Stud, i.e. the amount of thread that goes through the Nave Plate of the Wheel Rim and the Wheel Nut, is slightly longer on later hubs fitted to Disc/Disc vehicles onwards, because the hub flange that they are pressed into is slightly thinner than the hub flange on earlier Disc/Drum vehicles.
Have a look at these threads on LR4x4 -
Wheel stud replacement - LR4x4 - The Land Rover Forum
Longer studs - LR4x4 - The Land Rover Forum
New wheels too thick - LR4x4 - The Land Rover Forum
Probably a Stupid Question - LR4x4 - The Land Rover Forum
The British Army has retro-fitted Tubeless 'Wolf' Rims to all of it's Defender (and pre-Defender 90/110) fleet.
In doing this, they have not fitted longer Wheel Studs to Disc/Drum vehicles.
What they have done, in consultation with Land Rover, is to revise the Torque Settings for the Wheel Nuts.
This quote is from the British Army 'KiT!' Magazine -
"The wheel studs do not protrude through the wheel nuts when the wolf wheels are fitted - this is due to the heavier construction of the rim. Perfectly legal, this modification has been authorised by Land Rover and was fitted to the original SNATCH vehicles in exactly the same manner."
Full article, on P.27, here -
http://www2.armynet.mod.uk/linkedfil...t68_lo_res.pdf
There's also an article on the correct torquing sequence, on P.26, here -
http://www2.armynet.mod.uk/linkedfil...fety/kit69.pdf
If you're interested, 'KiT!' Magazines ("The quarterly guide to equipment care in bite size chunks") dating back to 2005 can be downloaded from here -
KiT! Magazine
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