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Deposit for Next generation 6UL Wheels! Exclusively for Elise and Exige! Delivery Target is June 2024.
Introductory Priced at $1295/set.
New wheels are stronger and stiffer using industry leading Tilt-Cast Flow-Forming technology.
Lotus 111 platform - Elise/Exige specific design. The 6UL 111 wheelset is the lightest matched monoblock wheelset in the world. Because of the wide front caliper profile, an entirely new casting tool was developed for the front wheel. 15"x8" front is only ~12.2lbs and the super wide 17x9" rear is only ~16.2lbs!
We determined custom offsets for both front and rear for clearance while preserving the motion ratio and thus roll couple bias of the 111 chassis. We can now run 1.5" wider wheels front and rear that look great, fit well, and add tons of grip.
This is our favorite wheel and tire combination we've been using for years with our custom 3 piece wheels for years. The stock 16" front has terrible tire selection. The 15" front is lighter, provides better geometry, and far more performance tire options.
NASA and SCCA have ignited a tire war in the "Super 200" tires. These are 200 treadwear tires required by these sanctioning bodies for street tires. The result is a large selection of super fast Street/Track performance tires that wear really well. These tires are FASTER and wear far better than 60 treadwear Yokohama a048s that came on the Lotus with the sportpack(LSS).
For front 225/45R15 adds a ton of front tire while dropping the front a few millimeters for better turn in. The rear either 245 or 255/40R17. 9" meats on the back of the car looks fantastic and sticks like crazy. Bridgestone RE-71R, Yokohama A052, Falken, Hankook, and Continental all great options.
These wheels feature dual valve stems so you can do a nitrogen purge without special equipment.
These amazing wheels are available only in matched sets in the awesome Beskar color. Picture below is a rendering only. The actual wheels should pop even more. Very similar to ND Miata High travel medium silver. Our goal is always to have a unique color that works well on EVERY car. Not tired High-Power Silver or Satin Black. Beskar is high-travel meaning lots of shadow variation to show off contours.
- 15x8, ~12.2 lbs
- 17x9, ~16.2 lbs
- 4x100
- TILT cast, flow formed monoblock construction
- T6 heat treated
- 56.6mm center HUB CENTRIC bore, does NOT need hub rings!
- Front VIA 550kg max load rated (increased from 500kg)
- Rear VIA 580kg max load rating (Increased from 500kg)
- Double valve hole design
Function First
Our basic approach is to start with a big brake template that we need the wheel to clear. We may make a 3D scan of the brake and wheel well to determine the envelope we have to work with. Next comes fatigue life targets. FOS “Factor Of Safety” refers to how much stronger a structure is than the minimum required strength. Strength in this case is load x duty cycle. How big a hammer and how many times you hit it. We aim for an FOS of 2 at 10% above industry standard load. So if the DOT/JWL standard is say, 690kg at 500k cycles, we bump that load 10% (760kg) and test for 1M cycles. Once we have reached our strength targets, we work to optimize weight by reshaping and reducing mass where we can without affecting strength. But the starting point is always strength and fitment. The final weight is the product of those two.
Everything else being equal, a stiff wheel that weighs 10% more will drive better and be faster on a race track than a lighter wheel that flexes 10% more. In practice, we can engineer a wheel to gain more percentage of stiffness than it gains in weight. A simple gusset here, chamfer there, a tweak in radii rewards us with big gains in stiffness and fatigue life with only a minor weight increase. The result is a light weight, purpose built, high performance wheel that we can offer a lifetime structural warranty on.
What we are ultimately focused on from a structural perspective is the highest possible strength to weight ratio. A super light wheel is pointless if it flexes so much that your tires wear uneven or the wheel wears out too soon. On the other end of the scale, a super strong and stiff wheel is overengineered if the same values can be designed at a lower weight.
What is Tilt Casting?
Aluminum alloy wheels are made by either casting or forging. Cast wheels are either gravity, low pressure or tilt cast. Gravity casting makes up probably 90% of all aftermarket alloy wheels. Low pressure a smaller percentage and tilt cast perhaps 1-2%. Flow forming gained prominence in the mid 2000’s and is now pretty standard for any performance oriented wheel. Most of the high end performance and race oriented aftermarket wheels offered in North America are gravity cast & flow formed. Our 6UL wheels are tilt cast & flow formed.
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Features
- Double valve hole design for easy nitrogen purging and improved balance
- Knurled anti-slip- bead
- TPMS compatible
- Durable painted and clear coated finish
- Cap included, chrome with carbon logo
- Valves not included. Requires 2 valves per wheel
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