A place for general chat about the Jimny. Please make sure you post in the correct section on the site, this way it keeps the site tidy AND ensures you get a more relevant answer.
Suppliers/Dealers or anyone selling with a commercial view in mind CANNOT post here unless responding to a specific request of a member in a "wanted" post.
Suppliers include people "breaking for spares" on a regular basis, when purchasing spares members should ask a supplier what they contribute to the running of the forum particularly if contacted by a Private Message
Suppliers or Members who have contributed to the forum can be identifed by the
Propose putting Cooper Discoverer AT3 4S 235/75R15's on a new JB74. Interested to hear any observations on this - especially from real life experience of the size if not the brand. Considerable chatter on various blogs suggest this is a bridge too far. Others say it's fine, and suggest impact on performance and fuel economy, while clearly evident, are manageable/acceptable. These tyres do not have a particularly aggressive tread but they are obviously considerably larger, and heavier, than the standard issue ( in Oz) of 195/80R15. The vehicle is about to have a 45mm lift, so about 2 inches, more for GVM impact than the lift per se, so the tyres will certainly fit - on 7" aftermarket rims - but the principal concern is whether the increased weight/rolling resistance is too much to ask of the motor and other components. Appreciate any input.
Navigator again on this. Subsequent to post came across a considerable discussion on this precise size for JB 74 on BigJimny - and it only heightens my interest in informed input: Various views expressed in the discussion that mirror what I have said in post above: Some say regearing needed. Others say not. Prepared to put up with need to be more mindful of tyre influence when in low range - and when tackling, especially, steep gradients. Also relatively content with some reduction in fuel efficiency - but remain much interested in feedback on whether this proposal likely to have significant negatives for vehicle overall.
I'm running a 215/75R15 AT's on mine. I'd say it has had a significant knock on performance and mpg vs the factory fit tread and size.
I don't think I'd want to go bigger without potentially re-gearing and maybe a bit more power. Although it is hard to know if the next size up would have much more of an impact or not. But I suspect it would.
I think with a 235 your low 1st crawl speed would suffer too.
Navigator again on this. Subsequent to post came across a considerable discussion on this precise size for JB 74 on BigJimny - and it only heightens my interest in informed input: Various views expressed in the discussion that mirror what I have said in post above: Some say regearing needed. Others say not. Prepared to put up with need to be more mindful of tyre influence when in low range - and when tackling, especially, steep gradients. Also relatively content with some reduction in fuel efficiency - but remain much interested in feedback on whether this proposal likely to have significant negatives for vehicle overall.
I have 235/75R15 Muddies on mine. Off-road they are great, and wouldn't change them for anything, they handle even the steepest gradients without any issues. I drove home from a trail yesterday at 75mph, with no issues at all, except for the fuel consumption which is around 20mpg .
Everything you will read will be negative except possibly the aesthetics and/or the ground clearance.
Is this why you want to do it?
Aesthetics are personal and not open for discussion. Ground clearance increase will be nominal and only you can decide if the cost outweighs the benefit.
The negatives are legion, reduced braking efficiency, acceleration, top speed. Probability of bodywork touching, need to re-gear, extra wear on mechanical items, desire for more power to compensate for reduced performance, reduced stability.
There is a lot to consider.
Everything you will read will be negative except possibly the aesthetics and/or the ground clearance.
Is this why you want to do it?
Aesthetics are personal and not open for discussion. Ground clearance increase will be nominal and only you can decide if the cost outweighs the benefit.
The negatives are legion, reduced braking efficiency, acceleration, top speed. Probability of bodywork touching, need to re-gear, extra wear on mechanical items, desire for more power to compensate for reduced performance, reduced stability.
There is a lot to consider.
Roger
20mm may not sound like much, but in real terms it makes a massive difference.
logo.
