Building BBS RS wheels for NB 993, advice needed
#16
Simply to show what a 8.5J ET50 with a 225/45 Michelin tire (with rim protector) looks like - from this unflattering angle, you can see the slight stretch.
Note that the rim protector makes the stretch look bigger than it is, if you follow me.
and here is the rear - 9JET55 with 255/40 same Michelin same rim protector - could do with another half inch on the rim
Not noticable from distance unless you are looking
Note that the rim protector makes the stretch look bigger than it is, if you follow me.
and here is the rear - 9JET55 with 255/40 same Michelin same rim protector - could do with another half inch on the rim
Not noticable from distance unless you are looking
The following users liked this post:
ToSi (02-03-2023)
#17
Besides fit the choice of what wheel to use w/ what tire depends on what you are trying to accomplish
take for example a 225/45 x17,
this size is generally spec'd for a 7 to 8.5" wheel, the wider the wheel the more the side wall is tensioned, this leads t sharper handling at the expense of ride quality
secondarily the stagger either add to, subtracts from or leaves alone the basic nature of the cars handling ie over/under steer
increasing grip at the front from a wider tire or wider wheel or more tensioned side wall need to be balanced in back by a similar setup to keep the basi nature static,
more grip in front leads to less understeer
more grip in back leads to more understeer
take for example a 225/45 x17,
this size is generally spec'd for a 7 to 8.5" wheel, the wider the wheel the more the side wall is tensioned, this leads t sharper handling at the expense of ride quality
secondarily the stagger either add to, subtracts from or leaves alone the basic nature of the cars handling ie over/under steer
increasing grip at the front from a wider tire or wider wheel or more tensioned side wall need to be balanced in back by a similar setup to keep the basi nature static,
more grip in front leads to less understeer
more grip in back leads to more understeer
The following 2 users liked this post by Bill Verburg:
90decibel (02-07-2023),
orangecurry (02-03-2023)
#18
Rennlist Member
I learn something new each time I read a thread like this. Bill V. thank you for all of the invaluable advice. OP, think about 18” wheels for the win.
#19
Rennlist Member
i think if i were building a set of 3-pc, it would be hard to not justify buying this tool. maybe it's not as useful as i think it could be, but it certainly looks like it would solve a lot of measurement issues - especially if you're trying to max things out.
https://www.speedwaymotors.com/Wheel...hoC__EQAvD_BwE
https://www.speedwaymotors.com/Wheel...hoC__EQAvD_BwE
#20
RL Community Team
Rennlist Member
Rennlist Member
"The car is at RS height.
Daily driver"
Aren't these two items mutually exclusive?
Daily driver"
Aren't these two items mutually exclusive?
#21
Rennlist Member
Thread Starter
You got to be careful with your approach angle when entering parking lots, gas stations and such. Speed bumps need a bit of an angle and going slow. Overall I don't feel like it's too much of a hassle. Maybe it's because my other car is a GT4 with that huge overhang and I am used to being careful.
#22
Rennlist Member
Thread Starter
i think if i were building a set of 3-pc, it would be hard to not justify buying this tool. maybe it's not as useful as i think it could be, but it certainly looks like it would solve a lot of measurement issues - especially if you're trying to max things out.
https://www.speedwaymotors.com/Wheel...hoC__EQAvD_BwE
https://www.speedwaymotors.com/Wheel...hoC__EQAvD_BwE
#23
Rennlist Member
Thread Starter
Simply to show what a 8.5J ET50 with a 225/45 Michelin tire (with rim protector) looks like - from this unflattering angle, you can see the slight stretch.
Note that the rim protector makes the stretch look bigger than it is, if you follow me.
and here is the rear - 9JET55 with 255/40 same Michelin same rim protector - could do with another half inch on the rim
Not noticable from distance unless you are looking
Note that the rim protector makes the stretch look bigger than it is, if you follow me.
and here is the rear - 9JET55 with 255/40 same Michelin same rim protector - could do with another half inch on the rim
Not noticable from distance unless you are looking
#24
Rennlist Member
Thread Starter
1. The front. Do you think 2mm clearance between the caliper and the spokes of the face is enough?
2. The back. I think I will have a good chance with 10ET62. The other option (9.5ET69) will certainly need to have a spacer (7mm less stick out then stock).
#25
Thanks for the recommendation Bill! I have a couple questions:
1. The front. Do you think 2mm clearance between the caliper and the spokes of the face is enough?
2. The back. I think I will have a good chance with 10ET62. The other option (9.5ET69) will certainly need to have a spacer (7mm less stick out then stock).
1. The front. Do you think 2mm clearance between the caliper and the spokes of the face is enough?
2. The back. I think I will have a good chance with 10ET62. The other option (9.5ET69) will certainly need to have a spacer (7mm less stick out then stock).
2) 10 ET62 also fits, 9 ET 70 was an oe fit if that wheel is used w/ chains it requires a 17mm spacer to move it away from the inner chassis
#26
Instructor
This might be slightly off the main subject here but I’ve owned hand full of air cooled 911s over the years and I currently have an 86 930 in addition to my 993 and every one of them had this issue where the rear wheels are not centered left to right. I run a 7mm spacer on the left rear and it almost balances out the right rear that sits further out than the left.
Has anyone else noticed this issue?
Has anyone else noticed this issue?
#28
Rennlist Member
Thread Starter
#29
Rennlist Member
Thread Starter
Thanks for the input everyone! I decided to go with 17x8 et 49 fronts (0.5" lips) and 17x9.5 et 56 rears (1" lips) and 225/45x17, 255/40x17 tires. Now it's time to acquire the parts and do some work. Fingers crossed. Will keep you posted! :-)
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