Weird Aux Belt Size

[DaveDreads]

A few years ago BTM Fred did my belts and removed the aircon as it was broke, I need to change the aux belt as it's a bit frayed but on inspection I discovered he'd used a 1640 belt, the only belts GSF do for my 172 are 1125 1130 & 1660.

They do sell a 1640 but they're for Audi's and BMW's, obviously the size is right but will the ribs be the correct width for the alternator and whatnot?

https://www.gsfcarparts.com/134vg0420

 

[bloke]

as long as it's a 6pk will be fine.

 

[DaveDreads]

Cheers mate.

 

[bloke]

are you running without the aircon pump but with the belt under the idler pulley?

 

[DaveDreads]

I'm not sure I didn't really look that hard, just looked at the writing on the belt and went from there.

 

[DaveDreads]

Just checked my old invoice from BTM and it says 'removed aircon and replace with AC delete pulley'.

 

[bloke]

yup, belt goes under the ribbed pulley instead of over the original one.