13 replies to this topic

[P11 COV]

Theres a report on the slightly revamped Lotus Europa in Evo this month. They've altered the wheel sizes and 17/195 and 18/235 using Goodyears. Still the Vauxhall 5 bolt hubs so I guess this is an option for VX's also.

[A13EX_F]

already got the 17 and 18 inch option on mine:
although i'm runnin 205 fronts
and 235 rears

[Code Monkey]

slight but lets face it only slight increase in the terror of terrors weight, but does allow the size offsetting as Lotus recommend without the huge arch gap when dropping down to 16's on the front. Good vote for the GSD3's as well.

[A13EX_F]

actually the pro race 1.2's worked out using my bathroom scales to be the same weight as the wheels that came off

[leevx2.2]

ive been runing 17"front and 18"rear car drives 205 front and 235 rear . you fancy them they are up for sale
picy

Edited by leevx2.2, 06 January 2009 - 09:34 PM.

[leevx2.2]

ive been runing 17"front and 18"rear car drives 205 front and 235 rear . you fancy them they are up for sale
picy

here it is

[John Faulkner]

just a quick question for you guys running the 17/18" combos, what offset are you using please?

[oblomov]

ive been runing 17"front and 18"rear car drives 205 front and 235 rear . you fancy them they are up for sale
picy

here it is

What are the wing mirrors?

[RobNA]

What are the wing mirrors?

Silly

[Crazyfrog (Fab)]

What are the wing mirrors?

was there on the london run
from a motor bike didnt look as bad in the flesh plenty mods on this car btw and some are very good
did like the cigarette lighter the other way round and thats a from me on that mod ........

pur the compomotive on btw

[Mac-Cos]

just a quick question for you guys running the 17/18" combos, what offset are you using please?

Offset will mostly be driven by wheel width and tyre width/aspect ratios chosen. From testing a few offsets using stock vauxhall astra alloys I beleive you need to be in the 20mm area for the front if running 7" rim (upto 205/45?x17 tyre) and the rear around the 30~35mm offset if running an 8" rim with 235/40x18 (or 235/45x17) .
To low an offset number will push the outer edge of tyre/wheel towards/outside the wheel arch and too high will cause the tyre to foul the chassis at the front (usually behind the wishbones on lock) or rub the chassis legs with the rear wheels. Note running a 205/50x17 on the front will also likely foul the wheelarch liners so it may be best sticking with lower profiles if running the 205 width.

Not many wheel makers do these as offsets, team dynamics will in the pro race to special order as will Compomotive. Others will likely need spacers to get a vauxhall spec 35~45mm offset wheel down to correct level. Note when fitting spacers your mostly stuck with 5mm or 15mm and over as you need the hubcentric type with the wider ones. 5mm leaves some of the original hub centre exposed for the wheel to centre on and 15mm appears to be the minimum hub centric width spacer possible if wider is needed.

For info the spacer width is subtracted from the wheel offset to get the actual offset of the wheel when fitted. ie ET35 offset - 15mm spacer = ET20
(20mm offset) when fitted.
Also eibach spacers usually need longer wheel bolts that pass through the spacer, others types may bolt to the original hub using short bolts and then use the original wheel bolts to attach wheel to spacer (these add a fair bit more weight as they have 5 more bolts per side and the spacers are usually steel).

PS use the info at your own risk ie check first if you arent comfortable with this level of bodgeit engineering.

one further note higher offset numbers mean the wheel is actually inset into the wheel well more (as the offset is negative) so this can get a little confusing. Also the more the width of the track at the front is increase (by wider wheels with lower ET offset numbers) the more bumpsteer is likely to appear.

[siztenboots]

just a quick question for you guys running the 17/18" combos, what offset are you using please?

Offset will mostly be driven by wheel width and tyre width/aspect ratios chosen. From testing a few offsets using stock vauxhall astra alloys I beleive you need to be in the 20mm area for the front if running 7" rim (upto 205/45?x17 tyre) and the rear around the 30~35mm offset if running an 8" rim with 235/40x18 (or 235/45x17) .
To low an offset number will push the outer edge of tyre/wheel towards/outside the wheel arch and too high will cause the tyre to foul the chassis at the front (usually behind the wishbones on lock) or rub the chassis legs with the rear wheels. Note running a 205/50x17 on the front will also likely foul the wheelarch liners so it may be best sticking with lower profiles if running the 205 width.

Not many wheel makers do these as offsets, team dynamics will in the pro race to special order as will Compomotive. Others will likely need spacers to get a vauxhall spec 35~45mm offset wheel down to correct level. Note when fitting spacers your mostly stuck with 5mm or 15mm and over as you need the hubcentric type with the wider ones. 5mm leaves some of the original hub centre exposed for the wheel to centre on and 15mm appears to be the minimum hub centric width spacer possible if wider is needed.

For info the spacer width is subtracted from the wheel offset to get the actual offset of the wheel when fitted. ie ET35 offset - 15mm spacer = ET20
(20mm offset) when fitted.
Also eibach spacers usually need longer wheel bolts that pass through the spacer, others types may bolt to the original hub using short bolts and then use the original wheel bolts to attach wheel to spacer (these add a fair bit more weight as they have 5 more bolts per side and the spacers are usually steel).

PS use the info at your own risk ie check first if you arent comfortable with this level of bodgeit engineering.

one further note higher offset numbers mean the wheel is actually inset into the wheel well more (as the offset is negative) so this can get a little confusing. Also the more the width of the track at the front is increase (by wider wheels with lower ET offset numbers) the more bumpsteer is likely to appear.

check the clearance of the wheel spoke to the brake caliper too

[Mac-Cos]

<SNIP>



check the clearance of the wheel spoke to the brake caliper too

Good point, I've found a 5mm spacer on the front was all that was .required to clear std calipers with a astra vauxhall alloy (5 spoke 7" Et35-ugly wheel but cheap and just used for measuring stuff) but it still needed a 15mm spacer to clear chassis on full lock. The style of the wheels used will affect this. It may be solved naturally when getting the chassis clearance sorted, Also bolt lengths with 15mm spacers likely need to be in the 45mm length but care needed in case these extend too far in and foul the hub behind the brake disk, check by rotating wheel or examining hub clearance with just the bolt/spacer fitted (harder to see when wheel fitted).

[John Faulkner]

just a quick question for you guys running the 17/18" combos, what offset are you using please?

Offset will mostly be driven by wheel width and tyre width/aspect ratios chosen. From testing a few offsets using stock vauxhall astra alloys I beleive you need to be in the 20mm area for the front if running 7" rim (upto 205/45?x17 tyre) and the rear around the 30~35mm offset if running an 8" rim with 235/40x18 (or 235/45x17) .
To low an offset number will push the outer edge of tyre/wheel towards/outside the wheel arch and too high will cause the tyre to foul the chassis at the front (usually behind the wishbones on lock) or rub the chassis legs with the rear wheels. Note running a 205/50x17 on the front will also likely foul the wheelarch liners so it may be best sticking with lower profiles if running the 205 width.

Not many wheel makers do these as offsets, team dynamics will in the pro race to special order as will Compomotive. Others will likely need spacers to get a vauxhall spec 35~45mm offset wheel down to correct level. Note when fitting spacers your mostly stuck with 5mm or 15mm and over as you need the hubcentric type with the wider ones. 5mm leaves some of the original hub centre exposed for the wheel to centre on and 15mm appears to be the minimum hub centric width spacer possible if wider is needed.

For info the spacer width is subtracted from the wheel offset to get the actual offset of the wheel when fitted. ie ET35 offset - 15mm spacer = ET20
(20mm offset) when fitted.
Also eibach spacers usually need longer wheel bolts that pass through the spacer, others types may bolt to the original hub using short bolts and then use the original wheel bolts to attach wheel to spacer (these add a fair bit more weight as they have 5 more bolts per side and the spacers are usually steel).

PS use the info at your own risk ie check first if you arent comfortable with this level of bodgeit engineering.

one further note higher offset numbers mean the wheel is actually inset into the wheel well more (as the offset is negative) so this can get a little confusing. Also the more the width of the track at the front is increase (by wider wheels with lower ET offset numbers) the more bumpsteer is likely to appear.

thanks for an informative post