Tapered Roller Bearing Hubs--IT'S HAPPENING
07-25-2016, 11:22 PM
#126
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Nice selection of 23.5 OD non DOT tires for 16" rims. Hoosier in 11 and 12" width, Avon between 8 and 12.5" wide in half inch increments. Avon also makes them for 15" wheels 23.5 OD in 11 1nd 12.5" widths specs say they are 23.3" OD.
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07-27-2016, 12:41 AM
#128
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Those are Formula Atlantic tires tread width only 9.4" not even as wide as 245's and and the other is 23.5" OD 13" wide R25B compound by far the softest compound Hoosier makes.. I wonder if too soft. I know the guys Autocrossing on Avon can't run the softest compound cause they just melt on a 60 second run. medium compound even doesn't like dual drivers. Hoosiers R75A or A7 are slow on there first run and require some heat build up to reach potential by comparison.
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07-27-2016, 06:51 AM
#129
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Those are Formula Atlantic tires tread width only 9.4" not even as wide as 245's and and the other is 23.5" OD 13" wide R25B compound by far the softest compound Hoosier makes.. I wonder if too soft. I know the guys Autocrossing on Avon can't run the softest compound cause they just melt on a 60 second run. medium compound even doesn't like dual drivers. Hoosiers R75A or A7 are slow on there first run and require some heat build up to reach potential by comparison.
Point is, you can get 15" tires as wide as you want.
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08-12-2016, 01:45 PM
#130
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Hey cordycord,
How is the testing of these bearings/hubs coming along.
I am close to being due for a new set of bearings and would hate to replace them, with the normal lot, if these are going to be available soon.
How is the testing of these bearings/hubs coming along.
I am close to being due for a new set of bearings and would hate to replace them, with the normal lot, if these are going to be available soon.
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08-13-2016, 01:23 AM
#131
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Soon--could be very soon. The orders for the hubs can go in as early as next week, or whenever FM is completely happy with testing. All molds and tooling are complete. The hubs will ship with four loose 70mm wheel studs. They're loose in case you want to install shorter OE studs, or if you absolutely demand ARP studs. There will also be replacement bearing kits--these are cassette bearings that aren't designed to be serviced.
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08-13-2016, 01:27 AM
#133
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Those are Formula Atlantic tires tread width only 9.4" not even as wide as 245's and and the other is 23.5" OD 13" wide R25B compound by far the softest compound Hoosier makes.. I wonder if too soft. I know the guys Autocrossing on Avon can't run the softest compound cause they just melt on a 60 second run. medium compound even doesn't like dual drivers. Hoosiers R75A or A7 are slow on there first run and require some heat build up to reach potential by comparison.
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08-13-2016, 07:34 PM
#136
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I find up here where I've had autocrosses with ambient temps in the low 50's sometimes its very difficult to get and keep heat in them. Especially competing with street tire classes on PAX index.
Pretty sure with your weight of car you'd want A7 not R7. When I ran 245 R6 for NASA TT2 my fastest laps were almost always the last hot lap 8 to 12 laps in. Most of my competators ran A7 and only would do 3 or 4 hot laps before needing to cool tires there cars were heavier though 400 hp S2000 on 275's where I dialed back to under 330 hp and ran lighter and a Porsche 911 GT3 were on DOT Hoosiers, Others were using Yokohama slicks with a HP/wt penalty for it. Cars on Yokahama's were faster in the corners but we would pull on them early part of straightaways enough to offset ~400 lbs more weight if I remember right.
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08-15-2016, 05:54 PM
#137
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My A7s dont get much above 150* in my exocet, and it's 1900#. Same size. Probably a little easier on tires then a miata since the camber isn't as extreme and they see a little more airflow not being enclosed in a wheel well. Recommend over the R7 for sure.
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08-15-2016, 05:59 PM
#138
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I think it depends a little on ambient temps. A7 takes more time to heat up than A6 and seems to handle heat better last longer and maintains grip level for at least twice as many heat cycles than A6. A7 is definitely more track capable than the A6 was.
I find up here where I've had autocrosses with ambient temps in the low 50's sometimes its very difficult to get and keep heat in them. Especially competing with street tire classes on PAX index.
Pretty sure with your weight of car you'd want A7 not R7. When I ran 245 R6 for NASA TT2 my fastest laps were almost always the last hot lap 8 to 12 laps in. Most of my competators ran A7 and only would do 3 or 4 hot laps before needing to cool tires there cars were heavier though 400 hp S2000 on 275's where I dialed back to under 330 hp and ran lighter and a Porsche 911 GT3 were on DOT Hoosiers, Others were using Yokohama slicks with a HP/wt penalty for it. Cars on Yokahama's were faster in the corners but we would pull on them early part of straightaways enough to offset ~400 lbs more weight if I remember right.
I find up here where I've had autocrosses with ambient temps in the low 50's sometimes its very difficult to get and keep heat in them. Especially competing with street tire classes on PAX index.
Pretty sure with your weight of car you'd want A7 not R7. When I ran 245 R6 for NASA TT2 my fastest laps were almost always the last hot lap 8 to 12 laps in. Most of my competators ran A7 and only would do 3 or 4 hot laps before needing to cool tires there cars were heavier though 400 hp S2000 on 275's where I dialed back to under 330 hp and ran lighter and a Porsche 911 GT3 were on DOT Hoosiers, Others were using Yokohama slicks with a HP/wt penalty for it. Cars on Yokahama's were faster in the corners but we would pull on them early part of straightaways enough to offset ~400 lbs more weight if I remember right.
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10-20-2016, 08:02 PM
#139
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Soon--could be very soon. The orders for the hubs can go in as early as next week, or whenever FM is completely happy with testing. All molds and tooling are complete. The hubs will ship with four loose 70mm wheel studs. They're loose in case you want to install shorter OE studs, or if you absolutely demand ARP studs. There will also be replacement bearing kits--these are cassette bearings that aren't designed to be serviced.
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