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FFR5445
11-21-2014, 07:27 PM
I have a 118wb with the 15" tires. I want to fit 235/75-15 or possibly get new wheels and use 225/75-16. A few questions that I couldn't find answers to when searching the archives:
1. What will happen if I get a flat and install the 225/70-15 spare? I understand I will get some warning lights. Will the van still be driveable so I can continue on my trip and get it repaired or replaced at a later time?
2. If I get the flat tire repaired and refitted, do I need to clear the code or would it recognize the correct sizes and fix itself? If the code has to be cleared can it be done by unhooking the battery or would I need a scan tool?

I would consider buying 5 new tires that are all the same but after reading a few posts, the larger size will not fit in the spare tire carrier without modifications. But really, I could only justify the expense of the 5th tire if using a smaller tire disables the van.

surlyoldbill
11-21-2014, 07:51 PM
wheel speed sensors will freak out, and put you in LHM from what I'm told.

People are told to not even use different brands of tires across from each other, so I can only imagine that a significantly smaller tire would cause LHM or complete shutdown. Others will chime in, but this is my understanding.

owner
11-21-2014, 08:12 PM
It does cause limp mode. Best to avoid that situation if you can. I have put 16" wheels on my stock 15" sprinter, and I replaced the spare with same.

FFR5445
11-21-2014, 10:03 PM
I've been fortunate enough to never experience limp mode. How fast will I be able to travel and would I still be able to tow?


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johnshmit
11-21-2014, 10:05 PM
40 mph top speed and a Christmas tree on a dashboard.

dear2mhart
11-21-2014, 10:18 PM
40 mph top speed and a Christmas tree on a dashboard.

Don't forget, about the same amount of power that you get with a moped.:lol: I don't think it will tow well.

FFR5445
11-22-2014, 11:56 PM
I may be grasping at straws here but is there any way to prevent LHM by tripping an ABS error first? For example, what if I unplugged the ABS sensor or pulled the ABS fuse before installing the smaller spare? Sure it would trip some warning lights but would it prevent full on LHM?

Aqua Puttana
11-23-2014, 01:34 PM
I recall that there are posts here from members with actual experience using a different sized spare.

From my memory for the T1N everything remained normal up to about 40 mph. After that the dash lit up and LHM was set. I don't recall the LHM limiting to 40 mph. You should have power similar to a moped to eventually get to 60 mph or so. A search should get you the posts if you want details.

I may be grasping at straws here but is there any way to prevent LHM by tripping an ABS error first? For example, what if I unplugged the ABS sensor or pulled the ABS fuse before installing the smaller spare? Sure it would trip some warning lights but would it prevent full on LHM?
Interesting concept. :hmmm:

I wouldn't mess with the connector on the off chance that you mess something up. That said, pulling the ABS related fuses may do what you want. You may still get LHM.

The ABS fuses are under the driver seat if you want to experiment. The fuse locations for my particular Sprinter are shown in the following thread. The 3 horizontal fuse locations should be standard. Any others will likely differ. Consult your fuse map.

http://sprinter-source.com/forum/showthread.php?t=24683

The times that my dash ABS, or (not "and") ESP with ASR (Spinning Tire) has been lit didn't send me to LHM. It did lock the shift lever to require using a pencil to release. So pulling fuses may do what you want. You will probably lose Cruse Control also.

Let us know what the results are should you mess with pulling fuses.

Have fun. vic

derekhski
11-23-2014, 10:47 PM
I upgraded my little 118" T1N to 16" wheels. I bought the door mount spare tire holder and found a 16" steal rim on Craigslist. Then bought a used 225/75R16 tire, rim and mounting totaled $70. It's an inexpensive spare in the same size for the limited use it will get. No reason to pay top $$ for a spare. hope this info helps. Ps. Removed spare from underneath now thinking of what to do with the undercarriage room. Storage but for what?

shortshort
11-24-2014, 12:01 AM
The 235/75 will fit in the spare tire well if you let most of the air out of it. Carry a pump.