Interest Thread For Billet Rear Trailing Arms
Jan 25, 2019, 10:02 PM
#122
Jan 27, 2019, 10:57 AM
#124
You won't fit an 11" up front without aftermarket fenders or mutilating the stock ones. I have 10.5" +10 right now up front and my fenders are pushed out about 20mm, rolled flat and pulled a bit. I rub the frame at full lock and there is still rubber on the fender lip from tire rub. Moving to 11" and wider tires means sacrificing max steering angle.
Also, for anyone who isn't aware, Forgestar makes their F14 wheel in just about any width and offset you want and price is on par with other wheels mentioned here: https://www.forgestar.com/wheels/rot...ck-series/f14/
Also, for anyone who isn't aware, Forgestar makes their F14 wheel in just about any width and offset you want and price is on par with other wheels mentioned here: https://www.forgestar.com/wheels/rot...ck-series/f14/
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Name User (Feb 28, 2019)
Jan 27, 2019, 11:22 AM
#127
I was figuring I run a 9.5 +38 now, a 10" wheel will add near 7mm to the outside. I round to 10mm to allow for a tire that fits on the "wide" side. So, a +48 Should be the wheel about where it is now. I haven't actually looked to see how much room is between my current tire and the fender (rolled flat). It's possible the +42 would fit, though.
Or I could be doing the math wrong.
Or I could be doing the math wrong.
Jan 27, 2019, 01:04 PM
#128
Even my 18x10.5 +38 is still the right size for bigger tires. Remember, theres still more things to hit in the inside besides the trailing arm. The wheel is the problem with colliding on trailing arm typically but the tire itself is getting close to the strut and the inner fender well once rubber gets big.
For 295s, a +38 is still the right offset IMO once the trailing arm clearance is resolved.
Also, Austins setup up front with the Flags has to contend with fitting the tire beside the spring and not next to the body. That would be 0.75" more inner clearance. You do have issues with rubbing hard parts running front that high of offset, but if narrow is what you need fitting next the shock body helps a bunch.
For 295s, a +38 is still the right offset IMO once the trailing arm clearance is resolved.
Also, Austins setup up front with the Flags has to contend with fitting the tire beside the spring and not next to the body. That would be 0.75" more inner clearance. You do have issues with rubbing hard parts running front that high of offset, but if narrow is what you need fitting next the shock body helps a bunch.
Jan 27, 2019, 03:49 PM
#129
I was figuring I run a 9.5 +38 now, a 10" wheel will add near 7mm to the outside. I round to 10mm to allow for a tire that fits on the "wide" side. So, a +48 Should be the wheel about where it is now. I haven't actually looked to see how much room is between my current tire and the fender (rolled flat). It's possible the +42 would fit, though.
Or I could be doing the math wrong.
Or I could be doing the math wrong.
Fit is okay with 265s, Ohlins R&T, and front camber in the mid-3s. Tiny amount of rubbing at the back of the wheel well due to all the caster I added at the top of the strut. I use the Superpro offset bushing to push the wheel forward a bit, but it's not enough to completely eliminate the rubbing.
The 18x10" setup feels like threading the needle with spacing, but it works. Jumping to 18x10.5" is where things start to get difficult.
Jan 27, 2019, 04:01 PM
#130
18x10 +20 is the magic number up front for my car. I run RPF-1 18x10 +38 with an 18mm spacer (net offset +20) up front. 3mm spacer in the rear, stock trailing arm.
Fit is okay with 265s, Ohlins R&T, and front camber in the mid-3s. Tiny amount of rubbing at the back of the wheel well due to all the caster I added at the top of the strut. I use the Superpro offset bushing to push the wheel forward a bit, but it's not enough to completely eliminate the rubbing.
The 18x10" setup feels like threading the needle with spacing, but it works. Jumping to 18x10.5" is where things start to get difficult.
Fit is okay with 265s, Ohlins R&T, and front camber in the mid-3s. Tiny amount of rubbing at the back of the wheel well due to all the caster I added at the top of the strut. I use the Superpro offset bushing to push the wheel forward a bit, but it's not enough to completely eliminate the rubbing.
The 18x10" setup feels like threading the needle with spacing, but it works. Jumping to 18x10.5" is where things start to get difficult.
Jan 27, 2019, 06:34 PM
#131
My 285 re71r, NT03 18x10.5 ET30 works for me, about a finger gap between tire and fender lip..this is the lowest I can go anyway since the bumper already scrapes my driveway. i also carry wheels/tires/gear/10-20gal e85 in the back (sometimes). No spacer in the rear. Front has 10-12mm spacer (will doublecheck).
All 4 tires has about .7" to the 60mm springs. The edge of the rim to the shock body is a little over 1.25". I'll need to check how much clearance i have to the frame at full lock to see i can make wider wheels work.
Stupid question: Can the rear lower control arm be mounted upside down?
Trying to raise the spring perch and maybe move the shock back a bit
All 4 tires has about .7" to the 60mm springs. The edge of the rim to the shock body is a little over 1.25". I'll need to check how much clearance i have to the frame at full lock to see i can make wider wheels work.
Stupid question: Can the rear lower control arm be mounted upside down?
Trying to raise the spring perch and maybe move the shock back a bit
Last edited by ViciousLSD; Jan 27, 2019 at 06:41 PM.
Jan 27, 2019, 09:26 PM
#134
I have 265s on 18x10s, theyve been working great.
Tirerack shows the 275s wheel width range top end to actually be larger than the 285s but that's probably because the sidewall is larger. Over all the setups I've done (I've been through A LOT of tires) I've always been happiest with the wheel size being at the top end of the recommended spec.
Tirerack shows the 275s wheel width range top end to actually be larger than the 285s but that's probably because the sidewall is larger. Over all the setups I've done (I've been through A LOT of tires) I've always been happiest with the wheel size being at the top end of the recommended spec.