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Do E21 hubs w/ Volvo brakes change front track width?


Mucci

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Having trouble finding info on this. I planned a wheelset around the stock 2002 hubs/brakes but have just acquired the E21 hubs w/ Volvo caliper & discs brake upgrade. Will the front track width remain the same as stock with that setup?

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1975 2002 - US Spec, Taiga Green

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You might need to be more specific. The Volvo calipers mount to the stock location, and the hub fastens to the spindle with stock fasteners. The track width will not change, albeit by .077". There are other reasons some 13" rims will not work work with this setup, but you did not mention if that was your wheelset of intention 

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37 minutes ago, Guest_anonymous said:

You might need to be more specific. The Volvo calipers mount to the stock location, and the hub fastens to the spindle with stock fasteners. The track width will not change, albeit by .077". There are other reasons some 13" rims will not work work with this setup, but you did not mention if that was your wheelset of intention 

 

So it will change by .077"? How accurate is that number and in what direction?

Caliper clearance is not my concern. Tire to fender clearance is. I'm building a one-off 15" wheel setup.

1975 2002 - US Spec, Taiga Green

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The caliper will shim from the king pin mounting .077" I think it has more to do with the opening of the Caliper and the centering of that opening to the rotor when mounted.

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1 hour ago, Guest_anonymous said:

The caliper will shim from the king pin mounting .077" I think it has more to do with the opening of the Caliper and the centering of that opening to the rotor when mounted.

 

Ok thanks for the info. That 2mm of difference won't be an issue. I just wanted to make sure I wasn't going to find out this setup pushed the wheels out another 10mm and caused fender clearance issues. 

1975 2002 - US Spec, Taiga Green

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The question is not where the caliper center line is over the rotor.  You need to look at the mounting face for the wheel.  The stock 2002 Ti, Tii, and Turbo have the wheel mounted directly to the hub, this has the brake rotor mounted to the back side of the hub.  With the "Volvo" big brake conversion you use a E21 hub that has the brake rotor mounted BETWEEN the hub and the wheel.  I don't have the measurement from the bearing surface at the strut to the wheel mounting face for the standard 2002 or with the E21 hub with the rotor.   

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1970 1602 (purchased 12/1974)

1974 2002 Turbo

1988 M5

1986 Euro 325iC

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