SLK55 (R171) 2004 - 2010: SLK200K, SLK280, SLK350, SLK55, SLK55 Black Series

SLK55 tire and gear questions

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Old Mar 23, 2006 | 02:45 PM
  #1  
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SLK55, Mustang 480hp, CBR600rr
SLK55 tire and gear questions

What is the biggest rear tire anyone has been able to get on SLK55? The stock 245s seem a bit narrow for the amount of power specially with any kind of mods.

As for gears, does anyone sell a higher rear gear than the stock 3.07? Like one in the 3.2x or 3.5x range?

thanks
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Old Apr 20, 2007 | 01:59 PM
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SLK55, Mustang 480hp, CBR600rr
bump
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Old Apr 20, 2007 | 03:43 PM
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SL65
Originally Posted by Ppower
What is the biggest rear tire anyone has been able to get on SLK55? The stock 245s seem a bit narrow for the amount of power specially with any kind of mods.

As for gears, does anyone sell a higher rear gear than the stock 3.07? Like one in the 3.2x or 3.5x range?

thanks
Some have done up to 265 on the stock rims. 255 is the safest bet. When I change my stock ones I'll go 255 in the rear.

Not sure about the gears.
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Old Apr 20, 2007 | 04:06 PM
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I Did A 255 With The Same Pirelles...they End Up Filling Up He Rear Quite Nicely...also The Car Grips A Heel Of Alot Better.....jus My $0.02...
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Old Apr 20, 2007 | 05:42 PM
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'10 Porsche Turbo PDK, 500e, GL450
265

I'm trying to figure out if we can somehow stuff 275's.
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Old Apr 20, 2007 | 10:03 PM
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A lot of people seem to be using 265.. that's what kleemann fits on their SLK55 as well. I think if you get the right tire, like Toyo Proxes RA1, 265 should provide more than enough traction.
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Old Apr 21, 2007 | 01:47 AM
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dsb
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'06 slk55
Originally Posted by Addicted2Speed
A lot of people seem to be using 265.. that's what kleemann fits on their SLK55 as well. I think if you get the right tire, like Toyo Proxes RA1, 265 should provide more than enough traction.
My 265 PS2's aren't the softest compounds but they're pretty damn good. That being said, I still easily break loose and my engine is stock. I'm sure you'll have loads of fun, er frustration, when you try to put your 500whp to the road.
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Old Apr 21, 2007 | 03:23 AM
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Originally Posted by dsb
My 265 PS2's aren't the softest compounds but they're pretty damn good. That being said, I still easily break loose and my engine is stock. I'm sure you'll have loads of fun, er frustration, when you try to put your 500whp to the road.
PS2 are a good daily tire, but its definitely a huge performance compromise. I would definitely get some R-compound tires. On my 300hp elise, I've been using Yokohama A048 (1st pic) and it took off like a rocket with minimal wheelspin. Here's a few photos of R-compound tires: Yokohama A048, Toyo Proxes RA1 @ R888, Michelin Pilot Cups, followed by Michelin PS2 for comparison. You can tell the first 4 tires mean business just by looking at them
Attached Thumbnails SLK55 tire and gear questions-ra1.jpg   SLK55 tire and gear questions-ps2.jpg  
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Old Apr 21, 2007 | 03:32 AM
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Anyone tried the new Bridgestone tires ?
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Old Apr 21, 2007 | 11:49 AM
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Originally Posted by Addicted2Speed
PS2 are a good daily tire, but its definitely a huge performance compromise. I would definitely get some R-compound tires. On my 300hp elise, I've been using Yokohama A048 (1st pic) and it took off like a rocket with minimal wheelspin. Here's a few photos of R-compound tires: Yokohama A048, Toyo Proxes RA1 @ R888, Michelin Pilot Cups, followed by Michelin PS2 for comparison. You can tell the first 4 tires mean business just by looking at them
I hear ya. However, I still think you'll have a problem. The combination of high torque, no LSD, and skinny contact patch all work against you. Another issue is size availability. If you want 265/30/19, then some of the tires you suggested are unavailable.

The other problem, for me at least, is I wouldn't want an R compound unless I had a dedicated set of track wheels. I hear the Pilot Cups are dangerous in the wet. So, for daily driving, I would stay away from R compounds.

My 19" DPE's have the PS2's. My 18" stock wheels currently have the Yoko Azenis. I kept my stock wheels just for track events. They're not the best track tire, but they work well for AutoX and the road course yet are inexpensive.
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Old Apr 21, 2007 | 12:33 PM
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SLK 55 AMG
I don't think it's possibly to change the gears just yet. Maybe you can take them from another AMG model if the gearing is different, but it's not going to be an easy swap...

I do know of a lot of S2000 owners who change gears tho', they're able to drop 0-60 times by a few tenths of a second. Not bad.
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Old Apr 21, 2007 | 03:29 PM
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'10 Porsche Turbo PDK, 500e, GL450
sport cups

Its been raining quite a bit this last month ... I'm not having any problems with the sports cups in the water. I just drive a bit slower.

Still not enough traction though
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Old Apr 21, 2007 | 06:31 PM
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Originally Posted by dsb
I hear ya. However, I still think you'll have a problem. The combination of high torque, no LSD, and skinny contact patch all work against you. Another issue is size availability. If you want 265/30/19, then some of the tires you suggested are unavailable.

The other problem, for me at least, is I wouldn't want an R compound unless I had a dedicated set of track wheels. I hear the Pilot Cups are dangerous in the wet. So, for daily driving, I would stay away from R compounds.

My 19" DPE's have the PS2's. My 18" stock wheels currently have the Yoko Azenis. I kept my stock wheels just for track events. They're not the best track tire, but they work well for AutoX and the road course yet are inexpensive.
I'm definitely getting Kleemann LSD as well, I think its a must. As far as Pilot Cups in the wet, the one half of the tire is actually specifically designed to have good traction in the wet, they are supposed to be pretty good (see left side of the tire in that pic I posted). Plus you have traction control, so I wouldn't worry about it. What's really dangerous in the wet are A048, which is basically a motorcycle tire, on my 300hp elise without any form of traction control, no LSD, and 65% of the weight in the back. That took some getting used to
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Old Apr 24, 2007 | 12:04 PM
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I currenty run BFGoddrich g-force T/A KDW-2 which are pretty good, was just wondering if anyone has fit 255 size on stock rear rims.

Run Nitto 555RII on my supercharged mustang and they actually do better in the rain than I thought they would. Tread wear is not good, but that's what you get with r compound tires.

Last edited by Ppower; Apr 24, 2007 at 12:09 PM.
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Old May 12, 2007 | 03:32 AM
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265/35-18 will fit the stock rear wheels. it fills the gap nicely, no rubbing issues and doesn't stick out. just a word of caution... your speedo will be reading 2.2% slower than your actual speed.
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Old May 12, 2007 | 11:04 AM
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2001 Kleemann CLK 230K, 2006 CLS 350, GTR R35
Originally Posted by MGV156
265/35-18 will fit the stock rear wheels. it fills the gap nicely, no rubbing issues and doesn't stick out. just a word of caution... your speedo will be reading 2.2% slower than your actual speed.
mind explaining?
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Old May 12, 2007 | 02:41 PM
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Originally Posted by Acez
mind explaining?
http://www.miata.net/garage/tirecalc.html
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Old May 13, 2007 | 01:09 PM
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slk55 2005; e320 2004 sport
Sorry to be lazy, but is there a wider than stock tire size on 18's that does not affect the speedo and odometer?
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