Hitch Racks and Carbon Wheels Melting?- Mtbr.com
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  1. #1
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    Hitch Racks and Carbon Wheels Melting?

    So, I have been seeing stories of melted carbon wheels from people using hitch racks because of the close proximity to the exhaust tailpipe. I was thinking of buying a hitch rack for a long time, but I have carbon wheels. Just curious how common this is. racks. ENVE issued a heat warning and guidelines on what to do and not to do, but won't really solve the problem if their rack is the problem. I think the information will be helpful for anybody that has hitch

    How many have melted their carbon wheels from the car exhaust?

    Anybody have any DIY solutions for this if their hitch rack places the wheel to close to the exhaust?



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  2. #2
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    This is very vehicle dependent. I have seen it more with bmw's than any others. Their tailpipes sit higher than many, it seems.

    Yes, it can destroy carbon rims, but if it does, your tires are also trashed. I have seen bikes with alu rims have melted tires for the same reason.

    1. Choose a different rack (or specificallychoose a rack that will life the bikes above the tailpipes). One that lifts the bikes higher relative the hitch receiver, for example.
    2. Fab a metal shroud attached to the rack that directs exhaust down and away from wheels/tires (I have not seen this done, but have read about it).
    3. Choose a different rack type (say, switch to a roof rack)
    4. Use a riser/extension on your hitch. This will reduce vehicle tongue weight capacity (I have seen estimates saying to derate tongue weight limit of the vehicle by half)

    Sent from my VS995 using Tapatalk

  3. #3
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    I did this on my 4Runner to prevent any issue. The straight out the back pipe was heating up my rack. $20 and an hour of time but I also have a welder and all the other tools to make an easy job.

    Hitch Racks and Carbon Wheels Melting?-20170524_230728.jpg

  4. #4
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    What rack were you running on the 4Runner? I have a Kuat and did two 5000 mile road trips with no damage to alu wheels, that I know if. Iíll be inspecting it tomorrow am first thing, though.

  5. #5
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    Quote Originally Posted by JimmyAsheville View Post
    What rack were you running on the 4Runner? I have a Kuat and did two 5000 mile road trips with no damage to alu wheels, that I know if. Iíll be inspecting it tomorrow am first thing, though.
    Thule T2. I have a 4th gen V8 with the big hitch which sits lower than the V6 std hitch. Probably would have been ok but didn't want to take chances. I noticed the section of tray closest to truck by exhaust would get warm. Plus did not like the look of the resonator/tail pipe and exhaust coming in rear window when it's down so moving the pipe fixed all that!

  6. #6
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    Good job!

    Quote Originally Posted by gasmanxj View Post
    I did this on my 4Runner to prevent any issue. The straight out the back pipe was heating up my rack. $20 and an hour of time but I also have a welder and all the other tools to make an easy job.

    Click image for larger version. 

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    That is nice. I was thinking diverting the exhaust was perhaps a solution. I figured someone did it already. Thanks for posting the pic.

  7. #7
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    Quote Originally Posted by gasmanxj View Post
    I did this on my 4Runner to prevent any issue. The straight out the back pipe was heating up my rack. $20 and an hour of time but I also have a welder and all the other tools to make an easy job.

    Click image for larger version. 

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    Did this help with exhaust fumes in the rear window.

    Sent from my SM-G960U1 using Tapatalk

  8. #8
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    Quote Originally Posted by DTZee View Post
    Did this help with exhaust fumes in the rear window.
    Word on t4r.org is that it does. I want to mod mine before it warms up.

  9. #9
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    Quote Originally Posted by DTZee View Post
    Did this help with exhaust fumes in the rear window.

    Sent from my SM-G960U1 using Tapatalk
    Yep, fixed that problem too.

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