Can anybody tell me if these will fit? (17mm extensions)

[R00ST]

I just bought LincPimp's Buggy/pede (pede with ofna hyper buggy suspension front/rear).

The front is a touch wider than the rear (because the arm mounting points on the bulkhead are wider than the mounting points on the pede tranny). The difference is only about a 1/2 - 3/4 inch but I was hoping I could easily solve this.

Does anyone know if truggy 17mm adapters and buggy 17mm adapters are all universally sized?

I found these on ebay and was hoping i could just slap two of these on the rear to widen it 1/2 to 3/4 of an inch.

http://cgi.ebay.com/ofna-jammin-x1-c...3%3A1|294%3A50

Or do truggies generally have larger mounting points on the axle than buggies?

Any help is greatly appreciated!