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To Be, 7.5" Or To Be, 8.4"?


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#1 cosmic-dodo

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Posted 09 October 2019 - 09:44 PM

Thrashed out a thousand times I'm sure, but quite fancy the roller-skate look of the 10" classics but I have a '78 mini that's had a pretty good 1275 A+ inserted and I'm presuming they're the Metro 8.4's that were stuck on the end of the Mettys drive shafts.

The question; as I'm tighter than a nun's twizzle, could I simply buy the 7.5" diskies with calipers & pads and the adaptor plate rather than the full kit (although I guess I'm nearly there with the basics above £?)

Go... 😜😜😜

#2 nicklouse

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Posted 09 October 2019 - 09:59 PM

Well first things first never presume anything. Metro drive shafts will not fit a Mini.

 

if you have discs now you will need calipers discs and drive flanges.



#3 Ethel

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Posted 09 October 2019 - 10:29 PM

Metro swivel hubs don't have grease nipples & naturally the driveshafts are longer. Assuming they're more likely to be Mini 8.4's you'd need calipers, flanges, discs and pads.

There can be clearance issues with the ends of the swivel hubs

#4 haz

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Posted 10 October 2019 - 08:35 AM

Turn down the discs and make up some custom carriers? Bonus being you can get every extra mm of disc diameter and thus retain some braking performance.



#5 Curley

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Posted 10 October 2019 - 01:04 PM

Back in the day people would take the entire metro front hub assembly, disc, drive flange & 4 pot callipers (vented or non-vented). However the problem was the metro front hubs have a different geometry and as such the use of metro hubs should be avoided. 

 

Easiest thing to check is if your 8.4" are 2 or 4 pot. If 2 pot then you still have mini calipers and hubs so as others have said all you need is the caliper, disc and drive flange.

 

Have you considered turning you existing set up down to 7.9?



#6 cosmic-dodo

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Posted 10 October 2019 - 07:07 PM

Back in the day people would take the entire metro front hub assembly, disc, drive flange & 4 pot callipers (vented or non-vented). However the problem was the metro front hubs have a different geometry and as such the use of metro hubs should be avoided. 
 
Easiest thing to check is if your 8.4" are 2 or 4 pot. If 2 pot then you still have mini calipers and hubs so as others have said all you need is the caliper, disc and drive flange.
 
Have you considered turning you existing set up down to 7.9?


Grateful for the help and advice from all above - I'll check to see exactly what I've got first - really hadn't considered turning down the existing disc, not sure if I'll still have calliper clearance issuse and don't really want to be playing around grinding down and having thin walled calipers.

#7 Algordo1100

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Posted 10 October 2019 - 09:55 PM

It's not just the look of 10s. The ride is vastly better IMHO due to the larger sidewall. The difference in rolling diameter between 10s, 12s, and 13s being small in reality but 10s having the smoothest ride for everyday use as originally intended.




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