putting 20s on DC5

[SU88UR]

OK so ive managed to put in 20s on my DC5:

20x8.5 with offset +40 and tyres of profile 225/35. I can turn the front wheels nicely without scrubbing - no probs with the front. The rear - the wheels almost rubbed the wall inside the guard (next to where rear springs are)

now I wanted to know if the following will fit:
20x8.5 but with offset +45 (i.e. wheels will go sit inside a lil bit more) and tyres of profile 235/30 (i.e. lower profile but wider)....

anyone has experience of putting 20s on DC5? I plan to slam it once these are on (i will custom lower it by compressing the springs), so i will defeiniintely need to roll the guards etc but what are your thoughts/experiences on this?

[civicem1]

Roll your fenders and camber your wheels.

[jesmine0]

yeah. or keep the previous setup

[FASN8U]

post pics

[45SET]

Its good to see you wrote up or original post with a fair bit of information.

So the car hasn't been lowered yet? 8.5 +40 is fairly aggressive for a DC5, I have 17x8 +35 on my DC5R. The rear tyre is slightly tucking, with a fair bit of camber (Not sure exactly, but about - 1' to -2') and its only a few mm away from the guard.

But if the inside of the rim is fouling on the suspension, you'll want to push it out more, so a higher offset is the way to go... then you'll have to worry about he guards

[SU88UR]

Roll your fenders and camber your wheels.

did you really need to camber the wheels on your....err... DC5? its only 5mm difference (from +40 to +45), and another 5mm (225 to 235)

[SU88UR]

But if the inside of the rim is fouling on the suspension, you'll want to push it out more, so a higher offset is the way to go.

if you want to push it out then youll have to go with lower offset...the lower your offset is, the more your wheels will stick out...

[bmybny]

Hey i had 20' on my DC5. 225/35, with coil overs the back had a nice camber but too low on the front and the wheels would rub on the guard.

[45SET]

if you want to push it out then youll have to go with lower offset...the lower your offset is, the more your wheels will stick out...

I stand corrected... what was i thinking.

[SU88UR]

Hey i had 20' on my DC5. 225/35, with coil overs the back had a nice camber but too low on the front and the wheels would rub on the guard.

thx for the info dude :cool: please check ur inbox.

[JohnL]

OK so ive managed to put in 20s on my DC5:

Why do something so very silly?

[FASN8U]

would be a pretty boring world if nobody went out and did something abit different

[SU88UR]

Why do something so very silly?

nope it isnt. this is how you modify cars. FASN8U is right - try something different that will make your car unique. Besides theres already thousands of DC5s with 17s or 18s out there....

[JohnL]

nope it isnt. this is how you modify cars. FASN8U is right - try something different that will make your car unique. Besides theres already thousands of DC5s with 17s or 18s out there....

A modification should improve some functional aspect of the the car in some real manner, not make it worse. Uniqueness for it's own sake at the expense of function and safety is just silly. If you need unique then there are plenty of things you can do that don't make the car a liability on the road.

Adverse affects of very large OD rims, and the very low profile tyres fitted to them:

1) Insufficient sidewall compliance for road surfaces less smooth than the smoothest of racing tracks, leading to poor handling on less than perfect surfaces (dangerously so in some cases).

2) ULPT (ultra low profile tyres, ie. rule of thumb - less than 50 series) being very sensitive to correct camber, both static and dynamic (again a sidewall compliance thing), incorrect camber and suspension set up creating worse handling than if more realistic tyres were fitted (even on very smooth surfaces).

3) Additional rotating mass at each rim, affecting acceleration and deceleration.

4) Poor rim protection from short sidewall, leading to easily damaged rims.

5) Lack of sidewall compliance causing easily damaged sidewalls.

6) Large 'void' inside rim creating the optical illusion that the brakes are even smaller than they are in reality (such a large void only looks OK if the hole is filled with a credible brake, i.e. the centre is filled with a serious brake disc, not a tin lid...).

In racing, very large OD rims are sometimes used despite the fact that it may often mean having to use tyres with a lower profile than the designer would actually prefer to use. The reason is that very large rims allow very large brakes to be used, it's a compromise sacrificing some % of tyre performance for maximised braking performance.

Fitting huge rims and not fitting huge brakes makes no sense because you have the worst of both sides of this compromise, i.e. you pay the price but don't don't gain admission....

Most people who fit huge rims may think they are a performance mod, but in reality, in most instances, they are counter productive to performance. Many people will still fit them even if they know this, i.e. big wheels typically = fashion statement, not purposeful modification.

[chargeR]

I plan to slam it once these are on (i will custom lower it by compressing the springs), so i will defeiniintely need to roll the guards etc but what are your thoughts/experiences on this?

What springs are you going to get compressed? The ride is going to be very bad as whatever compressed springs you use they wont have the required spring rate to keep the car off the bump stops.

If your current setup with +40 nearly offset rubs on the inner guard then going to a higher offset is a bad idea. I would aim for somewhere around +35.

Roll your rear guards and you will probably have to do some guard mods at the front. Because you have increased the diameter of the tyres compared to stock there is a good chance that the tyre will hit metal seams on the chassis at the front before the strut bottoms out and get cut up. This is bad.


A modification should improve some functional aspect of the the car in some real manner, not make it worse. Uniqueness for it's own sake at the expense of function and safety is just silly. If you need unique then .......

.....em even if they know this, i.e. big wheels typically = fashion statement, not purposeful modification.

+1 to everything JohnL has said.

[FASN8U]

johnL - you have very valid points i admit that. did you ever think that he might not be building a track car? the road isnt a racetrack. maybe he dosent want to corner as fast as possible and stop qucikly at high speeds. 20's will be fine if he intends to drive the speed limit.

in response to rims being damaged easier with lower profile tyres , that realy comes down to where he parks and how he drives its like lowering your car , you just gotta be more aware when your driving over speedbumps etc. basicaly what im trying to say is not everyone doe's there car to "perform" better some people prefer there car to have that visiual WOW factor and look uniqe.

[mars_panas]

johnL - you have very valid points i admit that. did you ever think that he might not be building a track car? the road isnt a racetrack. maybe he dosent want to corner as fast as possible and stop qucikly at high speeds. 20's will be fine if he intends to drive the speed limit.

in response to rims being damaged easier with lower profile tyres , that realy comes down to where he parks and how he drives its like lowering your car , you just gotta be more aware when your driving over speedbumps etc. basicaly what im trying to say is not everyone doe's there car to "perform" better some people prefer there car to have that visiual WOW factor and look uniqe.

:thumbsup:

most people think modifying cars is to see how much faster it can go with all the mods put in but there's different style of modifying...

and i am guessing the thread starter is going for sexspec or VIP spec seeing his putting big shoes on his dc5 & dumpin it on its ass...

:p

[FASN8U]

well i hope we dont have another war lol. itd be boring it every honda was track spec and itd be boring if every honda was sexspec so yeh lol

[xntrik]

each to their own, his car, he does what he wants.

[SU88UR]

thanks everyone. yeah i forgot to say in the first place that im not planning to use this DC5 as a racetrack car or even as a daily car. i plan to drive it only on the weekends so im thinkin of puttin in 20s and slam it as low as possible. i have another car (crappy one) which i use for daily driving ;)

thanks for all ur advice and suggestions

[JohnL]

johnL - you have very valid points i admit that. did you ever think that he might not be building a track car? the road isnt a racetrack. maybe he dosent want to corner as fast as possible and stop qucikly at high speeds. 20's will be fine if he intends to drive the speed limit.

Legal open road speeds are easily high enough to get you into serious trouble if the car's fundamental dynamic capabilities have been inexpertly or inappropriately (for purpose) tampered with, especially if the car is very 'reactive' as a result of any changes (handling 'sharpness' can bite both ways). Even at lower speeds in slippery conditions you could well be asking for trouble...


in response to rims being damaged easier with lower profile tyres , that realy comes down to where he parks and how he drives its like lowering your car , you just gotta be more aware when your driving over speedbumps etc.

The road network is littered with unexpected bumps and areas of less than ideal surface. It's not just the predictable speedhump, but raised or depressed man hole covers, newly born potholes, recent road work etc.

With a poorly (or inappropriately) set up car you'll be fine most of the time, but there will come a time when you encounter some unexpected irregularity while having some 'hamless' fun on a twisty bit of road, and then you'll find where the limits of the car really lie (if you say that the car is only for show and that you'll never 'have a go' on it, then I just don't believe you...).

I do speak from experience having owned a road registered racing car (a very quick 'clubman' style sports racing car) that was way too stiffly sprung for road work. I spun that car more than once after hitting an unexpected bump, or on an unexpectedly slippery section of road (lucky to survive really).

Before you ask, I am a reasonably competent driver, having won a large number of kart races including a second place in a state titles.


basicaly what im trying to say is not everyone doe's there car to "perform" better some people prefer there car to have that visiual WOW factor and look uniqe.

Then that car shouldn't ever be driven on the road, not 'fit for purpose'...

Don't get me wrong, I'm not against modifications that are primarily for aesthetic purposes, but such mods shouldn't be extreme, as fitting 20" rims to a Civic is...

[55EXX]

20's on a dc5 to me is just like a pit bull with no teeth. nothing to be afraid off and you look at because it a unique breed but is no longer potent in the way it was bred.