Lookin to buy some discs for my 1990 jap import NA could someone please confirm the correct size are they 280mm x 26 mm or 280mm x 30mm? Or neither thanks bill

280mm x 26 mm for N/A up to '94.

 

280mm x 30mm for TT.......and N/A '94 and onwards.

 

Alz.

Edited August 17, 201114 yr by AlanZ

Cheers pal!

280mm x 26 mm for N/A up to '94.

 

280mm x 30mm for TT.......and N/A '94 and onwards.

 

Alz.

 

Upto 91 for the 26mm discs

I would look at getting yourself some TT calipers and discs in the future so much easier to get replacement discs and slightly better braking for the N/A, not a huge difference, but worth the upgrade.

Ah right ( I was just bowt to ask wat size the rears were too as I was gonna do all of them at once so wat are the sizes for the rears and does the tt have different rear calipers? Thanks guys!

The rear disks are 297mm x 18mm for TT and N/A. (Same disc for both)

 

The rear calipers are the same for TT and N/A.

 

Alz.

And is there any age preference again regardin sizes alz? Or is it just one size fits all? Cheers bill

One size fits all for the rear Bill.

 

If you are gonna change the front calipers for TT, there are 2 types available..... Alloy and cast iron. I am sure the favorable set to have is cast iron for better heat dissipation.

 

Cheerz matey,

 

Alz.

Much appreciated thanks for your help!

No worries...........

 

Alz.

Worth checking you don't already have the bigger turbo calipers on the front. I bought my new discs, put one disc on fine, other side was a different story. Turned out I had one 30mm caliper and one 26mm caliper!!

 

 

Master cookieman thank you for your reply so just to clarify (i know that by the img this is self explanatory but just want to check) after looking at your image i have the calipers which have sumitomo wrote on them (both sides) so this means i already have tt calipers right

 

Just spotted the writing on the first set of calipers too :oops: so i could have either i guess

Edited August 19, 201114 yr by Bill89

I'd guess you have 26mm, but anything is possible. If you measure the old disc it should be fairly obvious, or measure the gap in the caliper, minus the pad width.

...pad depth even.