235 tyre on 5.5" split

Submitted: Thursday, May 05, 2005 at 10:10
ThreadID: 22681 Views:3063 Replies:11 FollowUps:8
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Hi all,
Has anyone fitted 235 x 85 x 16 on 5.5" splits ?
Most tyre fitter are reluctant to fit them saying the rim is too narrow or the tyre is tubeless.
Any comment appreciated
Sanga
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Reply By: Wizard1 - Thursday, May 05, 2005 at 10:51

Thursday, May 05, 2005 at 10:51
I'm always amused at people that pay off the advice of experts in a field and seek the guidance of self made experts in this forum........

AnswerID: 109789

Follow Up By: sang - Thursday, May 05, 2005 at 10:59

Thursday, May 05, 2005 at 10:59
Hi Wizard1,
I should have said some tyre fitter. Most of the tyre dealer I contacted are not sure and consult tyre manufacturer book that say 6" rim. Some say it's OK. I know a number of people have fitted 235 to 5.5" splits and like to get their opinion.
Regards
Sanga
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FollowupID: 366353

Reply By: Steve - Thursday, May 05, 2005 at 11:42

Thursday, May 05, 2005 at 11:42
They fit OK...but of course they are tubed!!! Its a bigger tyre than the 7.50 x 16 that come as standard on those rimes and so are a tad more difficult to fit ..but they are a in some instances a better tyre ...depends on the job of course
AnswerID: 109792

Follow Up By: sang - Thursday, May 05, 2005 at 13:18

Thursday, May 05, 2005 at 13:18
Hi Steve,
Is there any other problem I may expect in fitting the 235 to 5.5" split with tube ?
The existing tube for 7.5x16, I think is also OK for 235x85x16.
I am doing a lot of heavy towing (2.5 tonne) van and some offroad (without the van). Any problem with airing down ?
Regards
Sanga
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FollowupID: 366377

Reply By: Rosco - Bris. - Thursday, May 05, 2005 at 11:50

Thursday, May 05, 2005 at 11:50
I have 235 as std on 7" rims so I'd be surprised if they 'legally' fit 5.5"

Cheers
AnswerID: 109793

Follow Up By: sang - Thursday, May 05, 2005 at 12:23

Thursday, May 05, 2005 at 12:23
Hi Rosco,
I thought legality only pertain to the running diameter of the tyre. 7.50x16 has the same running diameter as 235x85x16.
Regards
Sanga
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FollowupID: 366366

Follow Up By: Rosco - Bris. - Thursday, May 05, 2005 at 12:26

Thursday, May 05, 2005 at 12:26
I could be wrong Sanga ... usually am ;-]
But I thought rim width also came into it.
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FollowupID: 366367

Follow Up By: Redback - Thursday, May 05, 2005 at 12:32

Thursday, May 05, 2005 at 12:32
Also i think the 235 is a wider tyre hence the nead for wider rim.
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FollowupID: 366370

Reply By: Redback - Thursday, May 05, 2005 at 11:58

Thursday, May 05, 2005 at 11:58
As Rosco has said me too standard on ours is 235/70/16 on 7" rims i can legally go to the 235/85/16 wont fit spare tyre holder, but can't see it being legal on 5.5" rims.

Baz.
AnswerID: 109796

Reply By: Member - Davoe (WA) - Thursday, May 05, 2005 at 13:03

Thursday, May 05, 2005 at 13:03
yep no probs - plenty of them fitted to 5.5 splitties on the work vehicles in the carpark as I type
AnswerID: 109811

Reply By: Steve - Thursday, May 05, 2005 at 14:56

Thursday, May 05, 2005 at 14:56
Tubes are same size...reckomend you fit tubes that have not been punctured and are as new or get new ones..I always use Michelin tubes...make sure ant new tube is made of Buttyl !!
AnswerID: 109840

Reply By: garrycol - Thursday, May 05, 2005 at 15:46

Thursday, May 05, 2005 at 15:46
Max recommended width on a 5.5" rim is 215
AnswerID: 109847

Reply By: Member - Phil G (SA) - Thursday, May 05, 2005 at 16:14

Thursday, May 05, 2005 at 16:14
Lots of people fit the 235/85 on the 5.5 splits because you have a lot more tyres to choose from and 235mm is wider than 7.5 inches.

As far as legality goes, I think the tyre manufacturers set the recommended rim sizes - they pretty much all say 6-7 inch wide rims for the 235's.

I personally would be happy sticking to the 750R16 for the splits, and using the 7 inch tubeless rims if wanting to fit 235/85. As you say, they are the same diameter.

Cheers
Phil
AnswerID: 109848

Reply By: sang - Thursday, May 05, 2005 at 16:39

Thursday, May 05, 2005 at 16:39
A few people who fitted 235 to 5.5" splits say they have much less side wall damage than before because the side wall doesn't stick out as much compared with wider rim. Could this be correct ?
Sanga
AnswerID: 109857

Reply By: Peter 2 - Thursday, May 05, 2005 at 19:04

Thursday, May 05, 2005 at 19:04
I ran Roadgripper 235's (off abase 100 series) on std grey cruiser split rims for about 10 years all over Oz with nary a problem, better handling than 7.50's (less aggressive than a Roadgripper F) much better on sand. ran slightly lower pressures as a 235 is not as strong as a 8 ply 7.50. this was on a troopy
Peter
1996 Oka Motorhome

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AnswerID: 109890

Follow Up By: Member - Phil G (SA) - Thursday, May 05, 2005 at 22:49

Thursday, May 05, 2005 at 22:49
Peter,

Most 235/85R16 are normally stronger than the 750 as indicated by their load index ( most are 120) vs 114 for the 8PR 750R16.

Those roadgrippers are a little peculiar - I think you'll find the load index is only 108 which is unusual.

Cheers
Phil
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FollowupID: 366510

Follow Up By: Member - Davoe (WA) - Friday, May 06, 2005 at 15:02

Friday, May 06, 2005 at 15:02
A quick glance in the carpark again reveals that 80 std have 6 inch splitties and utes the 5.5 inch. 235s the common fit for both with some 7.5s
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FollowupID: 366618

Follow Up By: Peter 2 - Friday, May 06, 2005 at 16:37

Friday, May 06, 2005 at 16:37
Yes I forgot to add that those 235's had a lower rating, as did the 235 Adventurer's from memory.
Peter
1996 Oka Motorhome

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FollowupID: 366626

Reply By: muzzgit (WA) - Thursday, May 05, 2005 at 23:55

Thursday, May 05, 2005 at 23:55
I ran 235/85/16 on splits an an old FJ45. No problems.
AnswerID: 109951

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