Originally Posted by throttle response
i put a brand new set of gpas on at barber the first wera race this year.. at 90% riding the front would constantly slide out from under me.. i was seriously proping the bike up with my knee to keep it from lowsiding. my laps times were horrible. i came in, thinking well its either suspension or tire, so i took 1/4 round of preload out, and took that tire and wheel off, and simply bolted on a ntec.
Right off the bat, at the same 90 percent, hitting the same marks, and everything i was 4 seconds faster.. the bike simply would stick. it would do what i needed it to do.
now fast forward to tally.
i wanted to see if it was the suspension or the tire. i bolted my gpa tire and wheel back on the bike. went out (my best time was a 1:05 on power ones at this time from the year before), went out and run 1:08s and had the same excat sliding feeling. The bike would litterly fall down and want to low side in almost any corner where good throttle could be applied. I tried it, for a complete practice session instead of the 6 laps like at barber. Every lap in the same 4 turns, it would just wash out on me. Came in after that practice, bolted on my ntec wheel and tire, and same lines, same pace, and not a single bit of movement. You can feel the ntec under the bike.. i ran 1:03s in that practice session
the gpa fronts are just so unpredictable, its hard to race in comfort.. the sliding out/ no grip feeling is just horrible.
the ntec front gives you that complete convidence that you need. the grip is out of this world, and they last forever. i have 10 races and practices on this ntec front and its still in great shape.
the gpa REAR is fine with me however. I do run the gpa rear simply because of cost. it dont really give any sliding indication and when it does, you can control it. yes its about 1second slower than the ntec rear, but until i need that second, ill stick with the gpa rear.
thanks for the explanation bro. very much appreciated!
your info is very interesting. i was sketchy about the front on the last 2 trackdays i had. on the last trackday in august, i lowsided with no warning whatsoever. which boggled my mind. after i fixed my bike, i got back out there. i was determined to find out what the hell happened. and i did. what you described was what i felt after gettin back out there. front was slipping here and there at different lean angles/speed and corners. the rear however was a solid feeling. but i hate blaming tires or the bike. i say it was more of my fault due to negligence...i knew when i rode before the lowside, that those tires were on there 6th trackday of use. i gambled and had my get off.
everyone is different with tires. but i can for the most part agree with you. when i ran the first 3 trackdays, they felt solid, but i was running a slow to med pace (b group). so i wouldnt have felt what i felt during that time. a little history on the tire life for those reading...
i ran the tires for 3 consecutive trackdays (about 2-3 wks inbetween each td) with tire warmers. stopped riding about a month before being deployed for 7mo's in afghan. bike was stored for 8mo's, inside my dads house on fr/rr stands the whole time throughout fall/winter and beginning of spring. then i ran 3 trackdays a month after coming back home (july td's slow/med pace again and aug td decided to step it up a notch) using warmers. 3rd td lowsiding. so i say (IMHO) these tires are good for about 2-4 td's or less consectutively, depending on what track, pace and temp.
i have a jason pridmore school coming up in 2wks and possibly 2 more td's few weeks after. i have a new set of 209 gpa med fr/med hard rr. ill have the bikes suspension set up again at the track and have instructors follow and critique me. ill explain the situation to all of them and work from there to see if its me, bike/equipment or both. i do love how the bike rides with the profile and turn in from these tires. but grip and tire life on the other hand is a whole other topic. so ill just make the best use/experiment with the few new sets i have left before tryin out the ntecs or anything else.
again, thanks for your input. my thoughts about my tires make more sense now.