Hi!
Want to upgrade my front 14" Rotora disc to a 15" Rotora disc. Have the 19" Sf-challenge with +18 front 9.5. Does it fit?


Alex

 

theres a picture in the "alliance bbk" thread by mike@blackline showing a 15" 8pot under a 19" sf challenge. Maybe that will give you an idea.

your thread title was a tease

 

i know for an alliance bbk, the 8 piston caliper with a 15" rotor will clear under a 19" wheel, so i imagine it would unless rotora had tall calipers, which is as unlikely as it is unnecessary.

That being said, you probably cant just change like that. think about it, your caliper is built to hug the rotor exactly without actually touching it obviously. so the caliper for your 14" rotor is made specifically for that size rotor. You cant (or shouldnt) put it on a 15" rotor. plus you would need new brackets. so you'll need a new rotor, new caliper, and new brackets; an entire BBK. just upgrade to an alliance kit while you're at it

 

I disagree with what has been posted above, unless you know for a fact of this to be true of Rotora kits. Most companies, except Alliance evidently, use the same caliper for several different sized rotors and applications. I know for a fact with Endless, Stoptech and Brembo GT Kits each caliper is offered with more than one choice of rotor size and all thats required is the appropriate bracket to fit the caliper to that specific rotor.

OP, as far as finding out whether or not your new rotors will fit under your wheels, you are going to have to do some legwork to find the Rotora wheel clearance template and the dimensions for the caliper, rotor and brackets you want to install. I'm going to assume that once armed with that information you will know how to find the answer to your initial question.

The knowledge that a different kit from a different manufacturer fits under wheels similar to yours does not help you in the least as all these kits are different dimensions wise, unless these two kits are in fact the exact same and just re-branded (let me clearly state that I don't know if that is the case with the Alliance and the Rotora kit). Unless you can find someone running the exact same wheels as you (size, width and offset) and the exact same brakes as you or their re-branded derivative (same caliper, same rotor size) you won't find your answer without either using a template, talking to the manufacturer or installing the kit yourself.

Let me apologize in advance for any grammatical or spelling errors, I'm watching football as I type.

 

See if these two links give you the dimensions you are looking for, I'm too busy watching the Jets to look through them .

http://www.brakewarehouse.com/images...talog_2008.pdf
http://www.brakewarehouse.com/images...ance_chart.pdf

 

fair enough. thats surprising to me. i dont see how a caliper from a different size rotor could fit properly on another one. its like wearing a size 7 fitted hat that fits perfectly, and then putting on a 6 1/2 fitted. sure, itll go on, but its not the same dimensions. ill have to actually check the part #s and see if the calipers are different for an alliance 15 front and 14 front. to be honest im not 110% sure (im under the impression they are), but i guess i was quick to jump the gun in answering this
and no they're not in any way related to or rebranded rotora

 

If you look at two different rotors sizes side-by-side that fit the same caliper it will be much clearer.

The difference between a 15 inch rotor and a 14 inch rotor is only .5 inch in radius. As long as the rotor disc width is kept somewhat the same and most of that .5" loss comes from the rotor hat then it should still fit fine within that same caliper when installed with the proper bracket.

 

thank you, very interesting.