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Originally Posted by ffindling
Mike....
If you go to the FFR website, go to "parts" and look at their IRS option. They
offer a "standard width IRS" (59.25") (SKU 12301) and a "pin-drive IRS" (54.25") (SKU 12493) I would assume the 5" difference in width is to accomodate the differences between bolt-on and pin-drive hubs. They also offer "pin-drive" A-arms which I assume are also narrowed for the same reasons. They don't list the hubs themselves, but then again their parts
listing is far from complete and/or they source them from a 3rd party or
have their customers purchase them direct from that source.
....Fred
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Hi Fred,
When we were researching the use of pin-drive wheels on our EVO 5 frame we found we would have to shorten the arms by 2 inches in order to adjust for the pin-drive wheels 3.5 backspace and the adapter flange area, .75 inches. I have heard of many people running the adapters but can't find one with true pin-drive hubs on their FFR. If you have pictures or a contact name, that would be cool. The new TTR/FIA frame we have is all custom and designed with the intent of using 3.5 backspaced pin-drive wheels so switching to hubs is not a diffiecult undertaking, but a little expensive. We are going to offer the hubs as an option.
P.S. DavidNJ,
We are able to work in a reverse opening half boot lid for LeMans top cars. I remember you asking in another thread. It will come standard when I hard-top is ordered.
--Mike / Turn Ten Racing, Inc.