The following is an email exchange between myself and Bridgestone engineers......
I own a 2001 Kawaski ZX12R and have a couple questions for you....
1. Could you please explain the difference(s) in OEM specified tires and your replacement tires of the same model (BT010 for example) and size?
2. What is the difference between your Article No. 089389 (BT010F) and 105341 (BT011F) tires?
3. When someone orders a 12070ZR17 front tire, how should it be specified to the dealer to make sure they order the correct/desired tire? That is, does one order by your article number?
4. How can the end user verify that the correct tire was procured....i.e., what markings exist on the tire to show it to be what was ordered/desired? Is the article number or other refernce number on the tire?
4. What is the difference between your Article No. 089338 (190/50ZR17) and 103349 and 089532 tires, other than the tread depth differnce of 1/32-inch?
Are the carcasses the same? Are the compounds the same?
5. Do your forsee any problem in terms of utilizing at BT020 tire on a ZX12R riding for sport touring purposes?
The reason I ask the above questions is that I recently ordered and installed some BT010 tires for my ZX12. When the shop was mounting the tires, the gentlemen questioned where I had acquired the tires and explained
to me that all BT010 are not the same......there are different carcasses or other factors which could possibly cause the tire which I acquired to possibly wear significantly faster than other BT010 tires. Does this make sense? By the way, I installed a 190/50zr17 on the rear, not a 200 width tire.
Thanks for your time and effort in replying.
This is their reply......
Let's see if we can answer these questions:
1) OE tires are built and tested for specific bikes. They usually differ in construction, beads, compounds...
2) They differ in bead construction and ply cord material
3) Using the article number is helpful. The letter indicator is also stamped on the sidewall. Ex: G or J...
4) Refer to #3
4) The 338 is the standard replacement 190. The 349 is built for the GSXR1000 with a E on the sidewall. The 532 is built for the CBR929RR with a G indicator. The differences are mainly in bead construction.
5) Unless you are very hard on the throttle and very aggressive, the BT-020 should not be an issue.
JOHN B. ROBINSON
Motorcycle & Kart Product Manager
BRIDGESTONE/FIRESTONE NORTH AMERICAN TIRE, LLC
I will be emailing the Bridgestone engineer again with a couple more questions....stay tuned.