215 75 15 tyres car feels sluggish

Hello all

I've bought a prevoisly modified Jimny and having never driven one I don't know whats normal to them!

it feels sluggish and lacking power and struggles to maintain speed in 5th gear, I feel I have to rev it quite hard too, its fitted with 215 75 15 tyres which looking on the tyre wiki bit is nearly 6% bigger than standard, does anyone have any experience is this normal/ ok or should I look a bit deeper, I plan a service on the car new plugs etc but it feels a bit more integral than a general lack of power

thanks

ray

I noticed more drag from 215's when I changed, they are wider which causes more rolling resistance. Definitely slower than 205's in acceleration but that is what you would expect. Certain tyres are worse than others, I think my AT's only get a "G" rating for fuel consumption.

My car is still quite nippy though....

Have a look to see if your front brake callipers are moving nice and free. Jack each wheel up and spin it, have a listen, you can usually hear the drag from a warped disk or sticking calliper.

sniper

List of mods would help, a blocked cat can cause a lack of of power if it's slowly getting even more blocked

will have a check, I didn't notice a caliper or disc getting hot etc, the engine seems to rev free but will look at the Cat incase the exhaust is knocked flat somewhere, I've just ordered lots of bits of the forum shop to do a service

I don't know much about the car I bought it blind and pre modded, its got a snorkel, 2" suspension lift, Manual front hubs, a split charge and second battery, winch and big 215 75 15 BG mud terrain tyres on steel rims, it goes but feels wrongly geared to me hence the questions I feel like im thrashing it to get it going

If you mean BFG km2's these tyres are heavy
So what you're finding is more than likely normal
I have 225/75/16 km2's on steel rims weighing 30kg per corner