August 25th, 2020, 11:30 AM | #1 |
ninjette.org member
Name: Brad
Location: Zanesville Ohio
Join Date: Mar 2020 Motorcycle(s): 2004 Ninja 250 Posts: 74
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Front tire cupping issue
My front tire has 6k miles still tons of life but it is cupping. Tire pressure is checked before every ride. Its a Bridgestone Battle axe BT-45. Forks are 12mm above the triple trees. I did install the .95kg sonic springs and added 15wt fork oil using the Motion pro fork oil tool so i know the fluid level is dead on and my fork are not leaking. What can I look for that can cause this.
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August 25th, 2020, 12:56 PM | #2 |
Guy Who Enjoys Riding
Name: Jim
Location: North Carolina
Join Date: Jul 2016 Motorcycle(s): Ninja 250 Posts: A lot.
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It's not necessarily unusual to see something like cupping on a front tire with 6,000 miles on it. Can you post a photo of what you're seeing? My BT45 front is getting fairly worn now, and has a sort of sawtooth wear, with a ramp up to each diagonal tread groove.
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August 25th, 2020, 01:54 PM | #3 | |
ninjette.org member
Name: Brad
Location: Zanesville Ohio
Join Date: Mar 2020 Motorcycle(s): 2004 Ninja 250 Posts: 74
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Quote:
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August 25th, 2020, 06:30 PM | #4 |
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My OEM BT-45 front-tyre did that too. I suspect it has something to do with the small tread blocks. Replacement Shinko with larger tread-blocks doesn't seem to do it.
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August 25th, 2020, 08:13 PM | #5 |
Guy Who Enjoys Riding
Name: Jim
Location: North Carolina
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I don't know that it's a problem, just a normal wear pattern. The supermoto guys around here run a front BT45 on both the front and rear of their bikes at the track.
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August 26th, 2020, 04:31 AM | #6 |
ninjette.org member
Name: Brad
Location: Zanesville Ohio
Join Date: Mar 2020 Motorcycle(s): 2004 Ninja 250 Posts: 74
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Anyone else that ran the Shinkos feel like they could corner harder with the Shinkos then the Bridgestones?
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August 26th, 2020, 05:30 AM | #7 |
Guy Who Enjoys Riding
Name: Jim
Location: North Carolina
Join Date: Jul 2016 Motorcycle(s): Ninja 250 Posts: A lot.
MOTM - Oct '18, Aug '17, Aug '16
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August 26th, 2020, 05:53 AM | #8 |
ninjette.org member
Name: Brad
Location: Zanesville Ohio
Join Date: Mar 2020 Motorcycle(s): 2004 Ninja 250 Posts: 74
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August 26th, 2020, 08:25 AM | #9 |
Guy Who Enjoys Riding
Name: Jim
Location: North Carolina
Join Date: Jul 2016 Motorcycle(s): Ninja 250 Posts: A lot.
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Thanks. I've heard good things about Shinko tires, but have always used BT45s on the 250. I know guys who do track days on those and have trusted them. I wish there were an easy way to compare real-world traction between the Bridgestones and the Shinkos.
I've read on forums that wet traction is better with BT45s than Shinko 740 and 741. When I got my 250 it had a Kenda Cruiser on the front and it wouldn't do a stoppie. With a BT45 it will. |
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August 26th, 2020, 04:51 PM | #10 |
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I don't push it anywhere near hard enough to notice difference on streets. Both will let me scrape pegs and exhausts, which is faster than I should go on streets.
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August 26th, 2020, 04:53 PM | #11 | |
ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
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Quote:
I think both tyres have sufficient traction to go way, way too fast on streets. I think you're more likely to run out of good-judgement and skill before reaching limits of these tyres. |
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