Posts by BKL

Polaris' choice of wheel offsets does complicate finding mass-market (affordable) wheels. When I first started looking for an affordable way of adding new wheels, I would often find a wheel I liked that fit the Front of the Rear, but then would all-too-often discover there wasn't a usable matching size for the other end, usually because of offset.
The cheapest rear wheels which I felt would be a decent match for the Slingshot (once repainted/powder-coated to match stock wheel colors or after the 2 stock fronts and the new rear were repainted/powder-coated to match each other) are these Mustang wheels from American Muscle -
For the Base Slingshot S - Mustang 10th Anniversary Cobra Style Black Wheel - 17x10.5 (94-04 All) - Free Shipping. This 17x10.5" +28 mm Offset wheel has 14 spokes paired in a similar manner to the 16 spokes on the Base Slingshot. The shiny rim is the biggest difference and once recolored should look pretty good paired with the stock front base wheels. The wheel holds an affordable Nitto 555G2 315/35R17 which is almost an exact match for the diameter to the stock tire/wheel. The one problem for those with OCD is it has a +28 mm Offset causing it to center over 1" to the left compared to the stock wheel. I now have about 7000 miles on this tire/wheel combo and have not noticed any handling or nanny system problems. Unfortunately, the matching front wheel is a 17x9" +30mm Offset, moving the inside of the tire closer to the suspension components while also moving the outer edge of the wheel out about 1.5", possibly making trailering a tighter fit.

For the Slingshot SL - Mustang FR500 Style Anthracite Wheel - 20x10 (05-14 All) - Free Shipping. This 20 x 10" +45 mm Offset wheel should easily accommodate a 305 tire and should offer a reasonably close match to the stock SL wheels once recolored and should fit w/o any problems since it has the same Offset. The matching front equivalent wheel is an 18x9" +30mm Offset wheel which shifts the wheel about .3" closer to the suspension while also moving the outer edge of the wheel about 1.25" further out, possibly making trailering a tighter fit.

While I feel these wheels are a decent match stylewise to the Slingshot wheels, obviously, beauty is in the eye of the beholder (and their wallet).
American Muscle also offers this wheel - Forgestar Mustang F14 Monoblock Piano Black Wheel - 18x10 1810F14BLK42545 (15-17 Ecoboost, V6) - Free Shipping. It's a Forgestar F14 wheel in 18x10 +42mm Offset wheel that's sort of a cross between an SL and a Base S rear wheel. It has 14 spokes instead of the base wheel's 16, but the spokes look closer to the SL wheel in how they're arranged. It will let someone add a 305/30R18 tire to the Base Slingshot S while being close enough in diameter to keep the nannies happy.

AM sells this wheel for $360 w/free shipping. This wheel can be ordered thru other vendors in the desired wheel and Offset sizes need for the Slingshot at slightly higher prices.

I think Twist Dynamics may have bought the MadStad design or are now marketing it under their name. I say this because I bought a set of used MadStad hinges (the seller switched to DDM Works hinges) and Googled for MadStad extended hood hinge instructions and got links to Twist Dynamics hinges and they look identical.
IIRC, there were some complaints about the MadStad hinges initially. Don't know if it was poor instructions, a design problem or if they released a new version. Haven't heard any negative comments about the DDM Works hinges.

The Clarion XC2410 is an affordable 4 channel amp with reasonable RMS power output. The XC2510 is the same amp with a subwoofer amp added and can occasionally be found for well under $200 (EBay), although it's more often closer to $300.

My earlier statement where I said the "255/35R20 might work OK with the 315/35R20 w/o triggering the nannies" was partially based on @Slingrazor's experience running the much taller than normal tire.
I'd love to have a Polaris engineer or an engineer from one of the tire companies provide more details on tire sizing and the interaction with Traction and Stability Control systems since those 2 systems would seem to be more affected by changes in tire sizes than would ABS. Such info would go along way towards clearing up the many questions about safely changing tire sizes.
Most tire manufacturers provide recommend wheel sizes for their tires. Here are links for Nitto 555 G2s and Motivos -
NT555 G2 Summer Ultra High Performance Tire | Nitto Tire.
Motivo All-Season Ultra High Performance Tire | Nitto Tire.
Technically, Nitto recommends using 10" wheel minimum for the 305 tire, although I seem to remember seeing some Mustang and other vehicle owners posting they'd used a 9.5" wheel. Using a smaller than recommended wheel might well void any warranties, especially in the case of an accident that could be linked to using a smaller than recommended wheel.

@Casey_SS, the Proxies T1R sizes you posted should work fine together. As for the Nitto, the 245/40R20 with the 315/35R20 should work fine and I think even the 255/35R20 might work OK with the 315/35R20 w/o triggering the nannies, but I'd like to know if anyone else is already running those sizes before I bought them.

Got these in an email from a former co-worker. The last one is HILARIOUS!
Medical "Conversation Pieces"

I installed my amp in the infotainment cubby area after blocking off the opening to the engine compartment.

Quote from cbailey7a

@Slingrazor yes it is the oem sl wheel 20x9

As an example, Nitto lists these sizes for their 555 G2 as fitting on a 9" wide wheel -

Your best choices might be the 265/35R20, 275/35R20, 275/40R20, or the 255/45R20. As you move right on the list, the chances of triggering a nanny control increases. This link will give you an idea of tire diameters/speedometer changes - Tire Size Calculator | Check Tire Size Conversion | Discount Tire.

Quote from Casey_SS

On an SL, what guidelines do you follow to keep the nanny codes from showing up?

Generally speaking, you want to keep the ratio between the front and rear tire diameters as close as possible to the stock ratio (SL Front - 25.98" or 659.7mm, Rear 27.02" or 686.5mm). This means keeping the rear tire diameter about 4% larger than the front tires. As you vary from this value, you're more likely to start seeing nanny lights activated.
I don't know if Polaris uses a different ECu value for the SLR. The SLR is only slightly different compared to the SL in that the rear tire is about 4.6% larger than the front tires.

For the Base Slingshot, the numbers are Front - 25.08" or 636.8mm, Rear - 25.3" or 642.7mm, meaning the rear tire should be roughly .9% larger than the front tires. With my stock factory front tires, I've run the following rear tire sizes - 265/35R18, 275/35R18 (.4" taller than stock), 295/30R18 (.34" shorter than stock) and a 315/35R17 (.38" taller). I also bought a set of Base wheels that came with a Federal 285/30R18 rear tire which is .56" shorter than stock, but I haven't tried it

Another neat article - Power-multiplying exoskeletons are slimming down for use on the battlefield | Popular Science

Quote from War Hoop

When you have your top on does it get rid of the turbulence the front bars produce?

I guess so. I can't say I've ever really noticed any turbulence from my Twist Dynamics Top. I know the windshield is high enough that I really need to stick my hand up above the front edge of the Top before I notice any air flow.

Quote from Shatneyman

really???

Does that mean you don't like what I did? I just prefer it w/o all that low plastic to hit stuff. I still plan on adding a metal airbox to direct air towards the radiator and intercooler.

Quote from edwardaneal

I know I can always use a flat head to pop out the snap fasteners, but for the life of me I dont recall seeing any philips head screws

I know I used Phillips head screws for my radio dash plate. Can't remember if Polaris actually used any or not.

MadStad Single Adjustable 13", modded to mount about 1" closer to the hood during cooler weather. Still allows plenty of airflow under the windshield during the summer. It can actually be set so low I have to raise the windshield before opening the hood.

I replaced the Lower front wing with a rear spoiler. Does that count?
Got tired of having to adjust the Lower Front Wing after critter encounters during night rides.

I'm still thinking about redoing my DIY brackets.

Slightly off-topic, but I have a BIG problem with asset forfeiture when it occurs w/o a conviction, simply because the police might have some suspicions about why someone has a lot of cash with them. Convict someone of a crime and take their assets, no problem. Take stuff simply because you question their reasoning? How can that be legal?

I think there are a few. I know I keep a slotted and a phillips screwdriver tip in my ratchet handle driver.

Quote from FunCycle

How about the little Buick Alum.V-8 from around 1964. Land Rover according to the Hot Rod magazine produced it up till a few years ago. Performance parts are also available for it.

Quote from Ghost

Funny you should mention that. I was just speaking with a gentleman at the car show in Nashville Saturday about that very motor. My shop teacher in the mid 70's had a Triumph Stag with that engine in it. According to the guy I spoke with Saturday yhat engine was a 3.5 liter all aluminum V-8 originally made by Buick. One of those properly built with twin turbos should do a nice job in a SS.

Quote from FunCycle

A little more info on the the little Buick 215 Alum. engine from 1961. Rover did use the casting up until a few years ago. It was also used in the Indy 500 by Mickey Thompson in 1962.

I had a 1961 Buick Special with the 215 ci V6 and Powerglide auto trans. Great little engine, except for using iron cylinder sleeves in an aluminum block. being an ignorant teenager, I ran straight water for a short period and the galvanic reaction between the aluminum cylinder block the iron cylinder sleeve quickly ate a hole in the head! Befoe the head problem, that thing would go like a bat out of He..!
Oldsmobile offered a version of that engine, too. See - Oldsmobile / Buick aluminum 215 V-8 | The H.A.M.B.

Growing up, a friend's Dad took an old, round washing machine and gutted it using it as the base stage for a rocket he built in the backyard. We kids spent many an afternoon playing spacemen in the late 1950s, early 1960s! Wish I had a pic.

Around 13.6V, usually. I'll try to remember to pay closer attention during tonite's ride.
Update - Totally forgot!