W124 Tyres: Wheel Size And Tyre Size Problems | General Discussion

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W124 tyres: wheel size and tyre size problems

• Thread starter Thread starter GPH
• Start date Start date Sep 1, 2007
• Tags Tags problems size tyre tyres w124 wheel

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Who Replied? G

GPH

New Member

Joined Aug 24, 2007 Messages 7 I have had my W124 (1995) for around 6 years. After 4 tyres have blistered and comments from the the brand owner of "curbing" and a near serious accident I wanted to change the brand. I went to put on Bridgestone tyres after checking Which? magazine. To my horror and surprise the new tyre installer showed me that I had 2 J6.5's and 2 7's size wheels. The latter should have had 205 size tyres on them but had 195's as per the others - scary and hence the possible blistering! Has anyone any thoughts on if my car should have the larger at the back etc. I had bought two additional wheels from the local Merc. dealer which may be the larger ones - hard to tell after 4 years. The Merc dealer has been useless in helping me to know what I should have and what is safe. The supension is not lowered. Any help on knowing if the smaller wheels (J6.5) with 195 tyres are safe on all 4 wheels or if I should use the larger (J7's) with 205's on the rear wheels would be really appreciated - thank you. GPH Last edited: Sep 1, 2007

pammy

MB Enthusiast

Joined Dec 2, 2003 Messages 7,468 Location North Yorkshire Car hers - slk 320, his - dull diesel BMW fleet :/, Xtrail, Honda CBR 1100xx, Yamaha YZF600, Ribble Road Welcome. mod's will likely move this to the wheels section of the forum . But have a look here: http://www.alloywheelsdirect.net/information/fitting_chart/mercedes-benz It details what wheels will fit your car. It does look like the wrong tyres have been fitted but also that either rim looks OK for your car. Just decide which you want. I'm not sure how the 124 is set for having wider on the rear, it's not the norm for that model.

jpskiller

Active Member

Joined Nov 18, 2006 Messages 898 Location Preston, Up North! Car Wifes I had 15" with 195 tyres allround but now have 16" with 205 which is fine all round

Colin_b

MB Enthusiast

Joined Jul 9, 2007 Messages 1,779 Location Leicester Car C250CDI (C320CDI & SLK350, Sold) & the Trusty Citigo The 195 cross section tyres will fit a rim width of 5.5 to 7", so should be ok on th 6.5" wheels. 205 cross section should be fine on the 7" Check this site with your exact tyre size. http://www.alloywheels.com/tyrecalc.asp It looks like both those rim widths were used, are they the same diameter?

LastMinute

Active Member

Joined Sep 28, 2006 Messages 761 Location Switzerland Car None :-( 6½×15 with 195/65/15 was standard for all 124s, except those with Sportline suspension, which had 7×15 with 205/60/15. All four wheels and tyres should be the same size. OP OP G

GPH

New Member

Joined Aug 24, 2007 Messages 7

Colin_b said: The 195 cross section tyres will fit a rim width of 5.5 to 7", so should be ok on th 6.5" wheels. 205 cross section should be fine on the 7" Check this site with your exact tyre size. http://www.alloywheels.com/tyrecalc.asp It looks like both those rim widths were used, are they the same diameter? Click to expand...

Very many thanks for the reply. I have just checked the diameters of both the J7 and J6.5 wheels and they are the same at approximately 16 1/4 inches across. B

bolide

MB Enthusiast

Joined Oct 8, 2005 Messages 3,724 Location Brighton Car BMW E39 525 Diesel Touring If the 7" wheels were on one axle and the 6.5s on another then I wouldn't worry - lots of cars use different rim widths front and rear and many use different tyre sizes as well. I wouldn't associate blistering with this The rolling radius of a 205/60 is similar to that of a 195/65 and both setups are used on W124s. But there are no apllications from the actory that mix the two sizes Nick Froome www.w124.co.uk R

Rory

MB Enthusiast

SUPPORTER Joined Mar 12, 2005 Messages 7,612 Location Cheshire, UK Car C270CDi Estate (late 2004 facelift model) - Bought 2005, Sold 2022. I think many more recent MB's have a staggered set up as standard - my C270 Avantgarde has 7J fronts and 8J rears. The tyres are sized to give the same (near as dammit) rolling circumference - 205/55R16 on front and 225/50R16 on rear. There's a tyre size comparator here: http://www.miata.net/garage/tirecalc.html B

bolide

MB Enthusiast

Joined Oct 8, 2005 Messages 3,724 Location Brighton Car BMW E39 525 Diesel Touring The main reason to maintain rolling radius between axles would originally have been to avoid upsetting the ABS. With later cars it would be to avoid upsetting the ESP, 4WD, etc, etc, etc Trivia: late Porsche 928s used the ABS sensors to drive a tyre low-pressure warning system. If one wheel rotated faster than the others that tyre would be flagged as being low pressure Nick Froome www.w124.co.uk Last edited: Sep 2, 2007 R

Rory

MB Enthusiast

SUPPORTER Joined Mar 12, 2005 Messages 7,612 Location Cheshire, UK Car C270CDi Estate (late 2004 facelift model) - Bought 2005, Sold 2022.

bolide said: Trivia: late Porsche 928s used the ABS sensors to drive a tyre low-pressure warning system. If one wheel rotated faster than the others that tyre would be flagged as being low pressure Click to expand...

That feature can be enabled on facelifted W203's by someone with Star Diagnose and the right permissions. You must log in or register to reply here.

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