Powertap Freehub Replacement Question

[Lewis Moon]

I just bought a 2011 Powertap Pro+ and need to switch out the freehub (ShimaNo to Campy) I see there are different types..12 and 15mm. Which one do I need?

[shovelhd]

Call Saris and ask. They're very helpful. My guess is 15mm. You don't have a metric ruler, tape, scale, vernier, or micrometer?

[wallymann]

if you can pull the FH body off w/o tools its a 15mm setup.
if you need cone-wrenches, it's a 12mm setup.

[Tokeat]

Pretty sure you need the 12 mm. As I recall, only the SLC+ was 15 mm. The G3 is 15 mm. I may have a couple NOS powertap 12 mm Campy free hub bodies to donate if that's what you need. PM me if you're interested.

[Lewis Moon]

Call Saris and ask. They're very helpful. My guess is 15mm. You don't have a metric ruler, tape, scale, vernier, or micrometer?

I don't have the wheel yet.

[oldpotatoe]

Pretty sure you need the 12 mm. As I recall, only the SLC+ was 15 mm. The G3 is 15 mm. I may have a couple NOS powertap 12 mm Campy free hub bodies to donate if that's what you need. PM me if you're interested.

Make sure you have the wee spacer/shim/washer 'kit' also..to make the puzzle work with a different FH body...

[Lewis Moon]

Make sure you have the wee spacer/shim/washer 'kit' also..to make the puzzle work with a different FH body...

Are they different between the Shimano and campy?

[Lewis Moon]

Pretty sure you need the 12 mm. As I recall, only the SLC+ was 15 mm. The G3 is 15 mm. I may have a couple NOS powertap 12 mm Campy free hub bodies to donate if that's what you need. PM me if you're interested.

I'm interested!

[wallymann]

Are they different between the Shimano and campy?


12mm = yes, you need spacers when swapping FH bodies between shimano/campy - they're an essential part of the hub regardless of shimano/campy. the spacers are just two 1mm-wide spacers -- and you need both of them for either shimano/campy, they're just in different locations on the axle (http://brown-snout.com/cycling/tech/powertap_12mm_assembly.pdf).
15mm = no, no special spacers needed when going from shimano to campy.


FWIW i owned a recent PT PRO+ and it had a 15mm axle, but i think the earlier examples used a 12mm axle.

if the seller can send you an image of either end of the axle, just look for wrench-flats...if there are any present its 12mm and if not its 15mm.

http://www.cyclepowermeters.com/freehub-bodies-74-c.asp

http://www.cyclepowermeters.com/ekmps/shops/acaralimited/resources/image/12mmaxle.jpg
http://www.cyclepowermeters.com/ekmps/shops/acaralimited/resources/image/15mmaxle.jpg