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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Wheels and Tires Forum Sponsored by The Tire Rack > Changing RFT at home?



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Wheel offset calculator courtesy of BimmerPost.com. You may use this calculator to calculate what tire sizes you might need if you upgrade your tires, or what wheel sizes/offsets are compatible with your car.
    Current Wheel Width  inches             Current Wheel Offset  mm.
         New Wheel Width  inches                  New Wheel Offset  mm.
 
TIRE WIDTH
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ORIGINAL TIRES
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NEW TIRES
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Based on your stock wheel setup, your new wheel will have:
Original Tires Diameter (in.)
      New Tires Diameter (in.)
  Difference in diameter (in.)
           Percent Difference %
                     
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      04-18-2013, 03:26 AM   #23
alexwhittemore
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Originally Posted by garyhgaryh View Post
Take a look at the HF tire changer. It's $799 on sale, but I'm sure I can devise a tool to make runflats work.

I'll be ordering it later this week and will let you know if I can change runflats successfully at home.

BTW, I got about 8 cars at home so it's well worth it for me to invest in a tire changing machine. With four cars, you definite should get one.

Gary
You say that, but I'd venture a guess that if you can and have reason to afford 4+ cars, you're only DIYing the tire changes because you REALLY want to DIY. Or you're really cheap.

Although I suppose if you have >4 cars, you're probably also a gear head. So there's that.
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      04-18-2013, 06:27 AM   #24
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Quote:
Originally Posted by alexwhittemore View Post
You say that, but I'd venture a guess that if you can and have reason to afford 4+ cars, you're only DIYing the tire changes because you REALLY want to DIY. Or you're really cheap.

Although I suppose if you have >4 cars, you're probably also a gear head. So there's that.
I'm a gear head, a DYI'er (so is my wife), cheap, have too many hobbies, ...
Yeah I can say I'm cheap ... gotta be cheap to pay for my other hobbies and maintenance of homes, wife, child, etc. I'm old enough not to be affected by what other people think of me being cheap. Typical BMW owners,we all know, are not CHEAP and must show off to friends as such (note the smiley).

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      04-18-2013, 06:36 AM   #25
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If you're anything like me, you won't like most tire changers, either manual or powered.

First of all you have to make sure that the machine has the capacity to do 19" wheels...

Secondly many tire machines actually have little spikes that dig into the inner barrel of the rim to hold the wheel steady while the tire is being changed. If you have nice looking open pattern alloys you definitely do NOT want to be using this type of tire machine, you want one with soft pads instead.

Finally it takes some practice to be able to mount/dismount a super low profile tire without damaging the rim; a RFT probably (I have no experience, I haven't even tried to work on mine) makes it even harder.

Then, after you're all done, the wheel/tire needs to be balanced. Making this proposition difficult for a hobbyist, unless you find a good shop that's going out of business and selling off equipment for cheap and also have enough garage space to keep a tire machine and balancer without losing a parking space.
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      04-18-2013, 01:59 PM   #26
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Save yourself the trouble, go to a shop and have it done right the first time. Its a lot quicker and god knows why you are paying 200. Normally, its maximum 25 or 35 (at absolute most) to mount and balance tires.

Maybe you've just been going to the wrong places and they take advantage of you and the roundel they see. Best of luck
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      04-28-2013, 06:58 AM   #27
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Save yourself the trouble, go to a shop and have it done right the first time. Its a lot quicker and god knows why you are paying 200. Normally, its maximum 25 or 35 (at absolute most) to mount and balance tires.

Maybe you've just been going to the wrong places and they take advantage of you and the roundel they see. Best of luck
Who said I was ever taken advantage of?
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      04-30-2013, 08:25 AM   #28
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Who said I was ever taken advantage of?
Well judging from the fact that you are paying 200 dollars for mounting and balance, that's what I would call it.

It's pretty common here in NYC where they see what you drive and hike up prices.
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      05-05-2013, 03:14 AM   #29
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Well judging from the fact that you are paying 200 dollars for mounting and balance, that's what I would call it.

It's pretty common here in NYC where they see what you drive and hike up prices.
Where did you get the info I'm paying 200 for mounting and balancing?
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      05-05-2013, 05:40 AM   #30
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Quote:
Originally Posted by garyhgaryh View Post
Where did you get the info I'm paying 200 for mounting and balancing?
Misappropriated quote:

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Originally Posted by rayoflight82 View Post
10 bucks?! Where?
I've been paying 200 bucks these past few years
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      05-05-2013, 10:55 AM   #31
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Where did you get the info I'm paying 200 for mounting and balancing?
Well, I thought you were the OP. I didn't think some random guy in the thread would reply to what I said when I was clearly responding to the original post.

Sorry for the confusion
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      05-10-2013, 02:53 AM   #32
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Quote:
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Well, I thought you were the OP. I didn't think some random guy in the thread would reply to what I said when I was clearly responding to the original post.

Sorry for the confusion
Ah! No problem. :-) .
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      05-10-2013, 06:18 PM   #33
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Second set of wheels?
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      05-10-2013, 10:06 PM   #34
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I got my new tires wrapped and mounted back on the car with air for $60.
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      05-28-2013, 10:21 PM   #35
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I got my new tires wrapped and mounted back on the car with air for $60.
That's definitely a good price!

I finally got the tire changer.



Not production quality, but who cares right?
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      05-28-2013, 10:39 PM   #36
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That's definitely a good price!

I finally got the tire changer.



Not production quality, but who cares right?
Gary
The machine or the vid?

Seriously, you put it in your house and not the garage?! LOL! How much to mount my PSSes to my 18s when they get here?!
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      05-28-2013, 11:00 PM   #37
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The machine or the vid?

Seriously, you put it in your house and not the garage?! LOL! How much to mount my PSSes to my 18s when they get here?!
The video . Machine works great! I'll put up a video of it dismounting a tire in a few weeks.

I put it in the basement. We are working on build a garage so that will come later .

Yes, I should mount tires for member and make it a business .
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      05-28-2013, 11:24 PM   #38
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      05-30-2013, 06:50 AM   #39
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so if your other car is a Cherokee you're a redneck? Dammit.

OP, does the changer you bought have soft pads for the wheel clamps?
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      06-01-2013, 02:25 AM   #40
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so if your other car is a Cherokee you're a redneck? Dammit.

OP, does the changer you bought have soft pads for the wheel clamps?
I'm not the OP, but people confuse me with him.
It does come with soft pads for the wheel clamps.

I haven't dismounted a wheel yet (getting ready for an interview next week). U know how that goes ...
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      06-01-2013, 06:12 AM   #41
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Somebody gonna get a hurt real bad....
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      06-01-2013, 12:26 PM   #42
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It can be done, with a good set of tire irons designed for truck or tractor tires and a small sledge hammer. depending on sidewall height (I'm not sure if there would be enough sidewall for 20"). Years ago, it was not unusual at all to have to change tires by hand. Regular tires were no big deal, but stiff industrial and truck tires on one piece rims took some effort. I would the stiff sidewalls on rft would be similar.

My question is why would you want to spend an afternoon working your a** off, when you could get all four done for $40 or less?
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      09-20-2013, 01:21 AM   #43
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Here's a video I promised ya:

Mounting and dismounting a lo-pro tire. This was the first try so I was struggling, but after that, it was quick and easy.

Why would I want to do it? Why not?



I'll be doing runflats next. Anyone know where I can buy "magic bead blocks"? They are basically a series of plastic blocks (tied together with steel cables) that pushes the sidewalls towards the drop center of the rim. I'll need those with the runflats since I don't have the assist arms on this changer.

You don't need a $28k machine to change runflats (at least I'm gonna try to prove that)!

Gary
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      09-25-2013, 10:33 AM   #44
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Changing low profile tires can be challenging, but changing low profile RFTs is even more challenging because the sidewalls are very stiff.

There are lots of threads on this forum about wheels being damaged by the bar they use to separate the tire bead from the wheel. It happened to me - 3 out of 4 wheels damaged by a seasoned veteran with good equipment. He wasn't careful enough.

Recommend you look for a good shop with good equipment and reasonable prices and have them do it.
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