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Discussion Starter · #1 ·
Well, I never heard this officially but a friend claims that steel wheels with hubcaps will warp ones brakes with anykind of spirited driving... I know personally I use 15" steel wheels at least 4 months a year (although winter months, overheating is unlikely) and I used these wheels full time for a few years without any brake problems besides normal wear under teenage driving! Is there any grounds what so ever of this claim? Like to hear your guys opinions. <br>What car manufacturer would sell a car with this option if it is inherintly bad for brakes?! I told him he was full of it, but I can see good heat disapation properties in open wheels...<br>He has two reasons, the steal holds the heat where the aluminum lets it go and hubcaps plus the design of the typical steal rim has poor ventallation. It makes some sense, but not brake warping... he said he read it in a magazine somewhere, likely SCC or something...<br>
 

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Re: Hubcaps wreck brakes? (Spearzy)

<BLOCKQUOTE>quote:<HR>He has two reasons, the steal holds the heat where the aluminum lets it go...<HR></BLOCKQUOTE><p>Huh? The steel wheels should be BETTER because they absorb more heat. Ask your friend what his rotors are made from, iron or aluminum.<p><BLOCKQUOTE>quote:<HR>...and hubcaps plus the design of the typical steal rim has poor ventallation. It makes some sense, but not brake warping... he said he read it in a magazine somewhere, likely SCC or something...<HR></BLOCKQUOTE><p>I would think that wheels with large hubcaps would not allow as much airflow over the rotor and caliper, so brake temps probably would be higher. However, I've seen plenty of spirited driving and hard braking on cars with wheels such as these, and no brake problems have occurred.<p>As you may know, the 850 is already prone to rotor warpage with hard use, so if you can make improvements to the braking system, you'll be better off.
 

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Re: Hubcaps wreck brakes? (towerymt)

Alloy wheels dissipate heat better due to the excellent thermal conductivity of Aluminum, but steel has a higher thermal capacity - the performance of the braking system due to the wheel material is probably undetectable. An open wheel design will help improve brake cooling - here, a steel wheel with a hubcap can fall behind in brake cooling - but I doubt that you'd experience early rotor warpage unless you were on a track! Most steel wheels/hubcaps have more than adequate ventilation for even spirited driving.<p>When Volvo first started adding air dams to the 240, they did post a warning in the owner's manual about brake cooling. They insisted that an air-dam-equipped 240 MUST use either alloy wheels, or 1980 or later steel wheels in conjunction with vented rotors. Given Volvo's extremely conservative nature, it would seem that steel wheels are not so much of a detriment as some people might think.<p>There is a product that some people have used that DOES significantly reduce brake cooling and increase the chances of warped rotors - Kleen Wheels, those plastic dust shields that are supposed to keep your nice alloys from being ruined by brake dust, decrease brake cooling to the point that pads fade and rotors warp under normal usage. They mount behind the wheel, and virtually cut off the flow of cooling air to the rotor.
 

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Discussion Starter · #4 ·
Re: Hubcaps wreck brakes? (11110000)

Very interesting about the 240's brakes, vented rotors with the hubcaps only. But, yeah I didn't think it would make to much difference in the grand scheme of things though. Mine always seemed adaquate. Thanks for the informative responses guys, I'll be sure to share this information. Oh I was pushing for him to get some steel wheels to save the aluminum wheels in are very salty winter streets and so the tangent against steel wheels started... <IMG NAME="icon" SRC="http://********************/smile/emcrook.gif" BORDER="0"> <br>I think it was mostly a reason not to spend a few hundred bucks on winter wheels, cheep bastard! lol <IMG NAME="icon" SRC="http://********************/smile/emsmile.gif" BORDER="0"> It amazes me when someone will drop a few grand on new wheels and not dish out a little extra for protecting the investment! But what do I care really, just trying to help...<br> <IMG NAME="icon" SRC="http://********************/smile/emcocktl.gif" BORDER="0"> <br>
 

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Re: Hubcaps wreck brakes? (Spearzy)

I just saw this post. I couldn't help but want to ask if the guy who told you that fastened his lug nuts on with just a wrench and didn't use a torque wrench. If the lug nuts are not on at the same torque, that may cause warping of the rotors. The torques don't have to be too different from nut to nut. Just a thought.
 

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Discussion Starter · #6 ·
Re: Hubcaps wreck brakes? (kowalski)

<BLOCKQUOTE>quote:<HR>I just saw this post. I couldn't help but want to ask if the guy who told you that fastened his lug nuts on with just a wrench and didn't use a torque wrench. If the lug nuts are not on at the same torque, that may cause warping of the rotors. The torques don't have to be too different from nut to nut. Just a thought.<HR></BLOCKQUOTE><p>That's the main reason I've heard for brake warping, forgot to mention that!! He has no steel wheel experience, this is what he said he read in a tuner magazine, likely an ad for aftermarket wheels vs. an article!! Either that or poor research done on the part of the journalist, I'd like to read this for myself. In anycase, he's dead against them, I guess he'll let his new aluminum wheels with all-seasons corrode in this winter! What a waste... <IMG NAME="icon" SRC="http://********************/smile/emthdown.gif" BORDER="0"> <br>
 

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Re: Hubcaps wreck brakes? (Spearzy)

<BLOCKQUOTE>quote:<HR>I just saw this post. I couldn't help but want to ask if the guy who told you that fastened his lug nuts on with just a wrench and didn't use a torque wrench. If the lug nuts are not on at the same torque, that may cause warping of the rotors. The torques don't have to be too different from nut to nut. Just a thought.<p>That's the main reason I've heard for brake warping, forgot to mention that!! He has no steel wheel experience, this is what he said he read in a tuner magazine, likely an ad for aftermarket wheels vs. an article!! Either that or poor research done on the part of the journalist, I'd like to read this for myself. In anycase, he's dead against them, I guess he'll let his new aluminum wheels with all-seasons corrode in this winter! What a waste... <IMG NAME="icon" SRC="http://********************/smile/emthdown.gif" BORDER="0"> <br><HR></BLOCKQUOTE><br>Actually, the main reason would be not the "uneven" torquing of the lug nuts but their <B> <I> <U>OVER</U> </I> </B>torquing.<p><br>Yannis
 

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Re: Hubcaps wreck brakes? (GrecianVolvo)

I was warping brakes all the time on my 850 R...and I had 17" Volans. I always attributed it to a heavy car with a crappy brake setup. Once I added slotted rotors though, the problem ceased. I attributed that to better cooling.
 
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