AndyMark Stealth Wheels

[Jay O'Donnell]

Hey CD,
We got some wheels in our FIRST choice. Does anyone have in-match experience with the 4" diameter .5" Hex AndyMark stealth wheels? How did they perform? How long did they last?
These are the wheels if anyone is wondering: http://www.andymark.com/mobile/Product.aspx?id=39576

[Steven Donow]

I believe the primary/intended use for them is FTC

[wilsonmw04]

Originally Posted by Steven Donow

I believe the primary/intended use for them is FTC

with a 1/2" hex and that bolt pattern? it's for FRC as well.

To answer the OP's question: I have not experience with this 4" wheel, but I have used their 6" wheel in the past and have no complaints.

[Ideal_Nerd]

We have the 8 inch version and it had mediocre traction the wedge are rough top tread is a lot better.

[AndreaV]

I've handled them and the tread reminds me of the harder compound kit wheels that were around before 2012. Those wheels were ok at best, I would go with anything else for frc drivetrain.

[mman1506]

We sometimes used them on our practice bot because they were cheaper and didn't wear as fast as our blue nitrile wheels. The tread is quite hard but the grip is fair (it's a lot like the old grey tread sky way wheels). After a while they would wear and leave the tread with a powdery feeling which reduced their traction significantly. I probably would not use them in competition unless you couldn't afford anything else. Vex's new hex Colson are a better option

[IndySam]

These may work on some FRC applications like intakes or object manipulation but I would not use them on a drive. The 4" high grip wheels are the same price and we have used them successfully for years.

[jeremylee]

The plastic hub can't handle the torque of a frc drivetrain without adding an aluminum hub. I think they'd work well for other things like pickups and shooters.

[cgmv123]

Originally Posted by jeremylee

The plastic hub can't handle the torque of a frc drivetrain without adding an aluminum hub.

Says who? Most other AndyMark wheels have plastic hubs, and they have spokes. The inside of the stealth wheels is solid plastic.

[Gregor]

Originally Posted by cgmv123

Says who? Most other AndyMark wheels have plastic hubs, and they have spokes. The inside of the stealth wheels is solid plastic.

I've broken more plastic Andymark wheel spokes than I care to talk about.

[cgmv123]

Originally Posted by Gregor

I've broken more plastic Andymark wheel spokes than I care to talk about.

But the stealth wheels in question don't have spokes.

[jeremylee]

Originally Posted by cgmv123

Says who? Most other AndyMark wheels have plastic hubs, and they have spokes. The inside of the stealth wheels is solid plastic.

1756 used them last year, robot was sitting first practice day with cracked hubs

[KamalRC]

Originally Posted by jeremylee

1756 used them last year, robot was sitting first practice day with cracked hubs

Yeah I think these wheels are not meant for a FRC drive, maybe an intake, but I believe they are more intended for FTC use.

[Scott Kozutsky]

There are no 6 or 8 inch "stealth wheels". Those products simply don't exist.
There is the 6in. "2008 FIRST Wheel" and the 8in. "2010 8" FIRST Wheel" (https://www.andymark.com/product-p/am-0144.htm and https://www.andymark.com/product-p/am-0420.htm respectively)

With that out of the way our team did use the hex bore stealth wheel a bit in testing and found that they were not very grippy. They were adequately strong to support an FRC robot and very light and cheap but otherwise not worth it. We found they didn't mark up the tile in our school much so that is pretty great for a demo bot. They also didn't wear down very much but then again we didn't do much testing. They're pretty hard so we'd expect them to last a while.

The new vex hex bore colson wheels look like a pretty great replacement. At $9.99 the Colson Performa (4" x 0.875", 1/2" Hex bore) wheels would drop in pretty much anywhere the stealth wheels would and will provide much more traction (colsons are great) and are also nonmarking and last a long time, but are heavier and more expensive. (http://www.vexrobotics.com/vexpro/mo...nperforma.html)

[mman1506]

I forgot to add that one of our students used stealth wheels for a tennis ball shooter that he built. The shooter certainly Isn't optimized but they have held up well and their performance seems quite good for shooting objects that are flexible.