Here is a high-traction wheel which includes a grippy rubber tire, an pneumatic inner tube, and a strong plastic hub. These parts are shipped to you in kit form. The unique aspect about this produc...Read More
Here is a high-traction wheel which includes a grippy rubber tire, an pneumatic inner tube, and a strong plastic hub. These parts are shipped to you in kit form. The unique aspect about this product is the competition-ready hub. The hub accepts any 200x50mm tire and inner tube, 1.125 in. (outside diameter) ball bearings (2 per wheel are needed), and the mounting holes needed to install hardware to be sprocket-driven or hub-driven. This wheel ships as a separate tire, inner tube, and hub halves. Assembly is required.
Important Notes:
Diameter: The nominal diameter for this wheel is actually 7.65 in. when inflated normally.
Tube pinching: When assembling the tube within the two hub halves, be careful not to pinch the tube rubber between the plastic hub halves. If assembled with the tube pinched between the hub halves, the tube may puncture and leak.
RPM Rating and notes:
These wheels are designed to be propulsion wheels for driving a robot or wheel chair. The design intent is to be contacting the ground, being driven by a gearbox at a maximum speed of approximately 500 rpm (which results in 17 feet/sec).
Within some applications, this wheel has been used as a shooter of objects, spinning at a very high rpm. For these applications, a higher rpm shows that the wheel may wobble, since the valve stem is mounted off to one side of the center of the wheel hub. We have seen properly balanced wheels, using securely mounted hardware (longer screws, washers) that can handle 5,000 rpm. When spinning this wheel at speeds up to 5,000 rpm, please take proper safety precautions.
The hub halves are held together with the #4-40 screws. This wheel can accept #10-32 screws for mounting sprockets or hubs, but these are NOT included since different length screws are needed to mount hubs or sprockets. These #10 screws can be mounted to the included 1.875 inch diameter bolt circle. The hub halves need to be assembled together so that the valve stem clearance holes line up. Locating features are present for easy alignment.
Usage: With Axle and Hub:
In order to drive this wheel with a hub, use Hardware Kit 11, which includes #10-32x2 screws (6) and #10-32 nylock nuts (6)
With Sprocket:
In order to drive this wheel with a plate sprocket, use Hardware Kit 12, which includes a 550 Sprocket Spacer, #10-32x2.25 screws (6) and #10-32 nylock nuts (6).
Two (2) bearings are needed for this wheel, if being driven by a sprocket. Use bearings with a 1.125 inch outer diameter. No flange is needed on either of the bearings.
Use as a caster:
If you want to let this wheel spin without being driven, you will need to install two (2) bearings with 1.125 inch outer diameter.
Specifications
Bolt Pattern: 6 holes, 0.20 diameter on 1.875 in. diameter bolt circle
Bore: 1.00 in. thru hole, with 1.125 in. x 0.375 in. deep bearing pockets
Diameter: 7.65 in.
Load Capacity: 120 lbs
Material: black polycarbonate, gray rubber
Maximum Pressure: 35 psi
Tread Width: 2 in.
Valve Stem: The valve stem may stick out up to 0.375 in. from hub
Great Quality. Product as expected. Highly sati...
Great Quality. Product as expected. Highly satisfied.
NL from Colombo 08
Verified Purchaser
5 out of 5 stars
Excellent way to improve traction
Also reduces impact loads to chassis. Running a #4-40 tap through screw-mounting bosses will eliminate assembly concerns. Durable and reliable, but nice to have a spare in the event of a catastrophic decompression.
LY from GAMBRILLS
Verified Purchaser
4 out of 5 stars
Review
4 Stars
TK from Cambridge
5 out of 5 stars
Review
5 Stars
SM from Pittsburgh
5 out of 5 stars
Review
5 Stars
DV from Bloomington
4 out of 5 stars
stripped screw heads
screws stripped easily
KB from Moose Lake
5 out of 5 stars
right product
fast delivery
PL from Montreal
5 out of 5 stars
"Review"
"5 stars"
YG from NY
4 out of 5 stars
Don't forget about the Valve Stem
We forgot to account for the valve stem. This really adds at least 1/4" to the width of the tire.
VH from Holland
5 out of 5 stars
Review
As usual, exactly what was ordered and processed / delivered very quickly.
JO from Peterborough
5 out of 5 stars
Excellence in Delivery
Being new to the FRC thing this year I am learning the ins and out of ordering for my team. Having the ability to have parts shipped directly to competition is a service that I truly enjoy. The parts were delivered on Thursday as promised and all was well.
TW from McMurray
5 out of 5 stars
"Excellence in Delivery"
"Being new to the FRC thing this year I am learning the ins and out of ordering for my team. Having the ability to have parts shipped directly to competition is a service that I truly enjoy. The parts were delivered on Thursday as promised and all was well."
TW from McMurray
5 out of 5 stars
8 inch Pneumatic wheel
5 Stars
JG from Flint
5 out of 5 stars
amazing customer service!!
The customer service at AndyMark is the most thorough I have encountered. I ordered wheels for my daughter's robotics team, and another parent had also placed an order. The customer service team worked very hard to find a solution, even though my order had already shipped. It required a bunch of phone calls, emails, and adjustments, but they were determined to help us, Thanks so much!
MB from Seattle
5 out of 5 stars
"amazing customer service!!"
"The customer service at AndyMark is the most thorough I have encountered. I ordered wheels for my daughter's robotics team, and another parent had also placed an order. The customer service team worked very hard to find a solution, even though my order had already shipped. It required a bunch of phone calls, emails, and adjustments, but they were determined to help us, Thanks so much!"
Mi from Seattle
5 out of 5 stars
PNeumatic Wheel
Thanks for quick shipping
AR from Bloomfield
4 out of 5 stars
pneumatic wheel
Was surprised to find they needed to be assembled.
AP from Sperry
5 out of 5 stars
"8 inch Pneumatic Wheel"
"The wheels arrive unassembled. Students need to be reminded that using a screw driver to pry the tire onto the hub can damage the inner tube. When carefully assembled and properly inflated the wheels perform very well. Max pressure listed on tire is 36 lbs. 25 pounds works well for us."
BF from Duluth
5 out of 5 stars
8 inch Pneumatic Wheel
Shipment was on time. No problems
DF from Platteville
4 out of 5 stars
"Awesome as flywheels"
"Used these in 2013, still using the counter weighted assembly for prototyping into 2016. The grip is perfect for a single or double flywheel shooter."
Ay
4 out of 5 stars
Keep Going and Going
We put a pair of these on our frisbee shooter for Ultimate Ascent, and they're still going. We bought these six to support our air cannon. We tried to make our own hubs, but it doesn't take much wobble to make a drop center act flat.
GM from Slidell
5 out of 5 stars
8" Pneumatic Wheel
Item packed and shipped in good condition and product is exactly as described
NT from Honolulu
3 out of 5 stars
"mixed"
"The tire seems fine, the tube had problems, the hub looks a bit flimsy - will see how it holds up. The biggest issue is the tube. It did not hold air straight out of the box. I tried to reseat the valve core, but this did not help. Only after replacing the valve core did the leak go away or at least get reduced significantly. The tube itself also looks like it will not stand up to long-term use."
WW from CA
5 out of 5 stars
Review
5 Stars
JS from Knoxville
5 out of 5 stars
Review
5 Stars
BB from Lafayette
5 out of 5 stars
"bon"
"bon"
MM from St-Mathieu de Laprairie
5 out of 5 stars
they were wheels
yup they were wheels
CJ from Oak Grove
5 out of 5 stars
Review
5 Stars
MM from St-Mathieu de Laprairie
5 out of 5 stars
Review
5 Stars
AZ from Green Bay
5 out of 5 stars
wheel
5 Stars
RR from Russiaville
3 out of 5 stars
Review
3 Stars
CS from Eau Claire
5 out of 5 stars
Review of 8 inch Pneumatic Wheel
5 Stars
MW from Tempe
4 out of 5 stars
Pneumatic wheels
If you are going to use these in the drive system, get several since the tread wears down very quickly. Also, one inner tube was shipped with a leaky valve which and went flat overnight.
DA from Tucson
5 out of 5 stars
Review
5 Stars
JW from Lawson
5 out of 5 stars
Wheel was excellent
This wheel was what we ordered. We did not use it on the robot so we don't know how it works.
DS from Seattle
3 out of 5 stars
"decent but not great"
"For the price of this wheel I expected a bit more quality. The tire quality is fine but the tube and hub leave something to be desired. The hub is split and assembles with 6 screws (3 on each side). These screws are cheap and strip reletivly easily, for the amount of force you have to put on them. Would recommend changing to a more robust hex head screw. As for the tube. The stem does not fit properly in the space provided. The valve stem is bent awkwardly in the wrong direction. This forces it to rest tightly against the hub, thus putting stress on the tube while also making it difficult to access with a compresser nozzle"
ts from Richfield
3 out of 5 stars
Wheels
We only ordered the wheels because they already have hubs that go with the bearings we have from previous kits of parts.
PM from Ashland
3 out of 5 stars
Review
The actual tires are not as uniform in composition as they could be. Tthere is enough irregularities that it makes them difficult to balance.
AD from columbia
5 out of 5 stars
Review
5 Stars
DK from Midland
5 out of 5 stars
Review
Love the wheels but had the valve pop into the tire during testing. Probably needed more air pressure.
BL from North Branch
5 out of 5 stars
Fast and Friendly
Fast Delivery even in the hecticness that is FIRST.
JN from Liberty Township
4 out of 5 stars
Nice and bouncy
This wheel has a decent fit, and the hub design is rather clever. It is rather unbalanced due to the valve stem, and there's no easy way to attach balance weights except to use double-sided foam tape.
DF from Tucson
3 out of 5 stars
It's OK but should come with instructions
This wheel should come with instructions, considering the intended market. (1) To mount the tire onto the beadseats, the tire should be lubed with soapy water. (2) The outer bolt circle, likely intended to prevent personal injury caused by tire inflation for a wheel that is removed from its vehicle attachment, MUST be installed, and if the wheel is to be disassembled to remove a tire, all inflation pressure must be relieved prior to removal of these important screws.
CR from Cassopolis
5 out of 5 stars
"review of pneumatic wheel"
"excellent wheel, easy to install (except for tube, but once you do one it gets easier)
nice looking too"
MM from Auburn
3 out of 5 stars
Review
have not had a chance to use yet
PO from Kincardine
5 out of 5 stars
AndyMark 8 inch Pneumatic Wheel
A great wheel for FIRST robots. Grippy, compliant and relatively light (given the performance). We are using three on our robot. Why three? Wait and see.
CM from Glenmoore
5 out of 5 stars
Review
5 Stars
JC from Lexington
3 out of 5 stars
Review
3 Stars
RH from Portland
4 out of 5 stars
Review
4 Stars
WS from Kailua
5 out of 5 stars
Am-0970
Ok
EB from Pittsburgh
4 out of 5 stars
wheels
Completely satisfied with the product. Shipping took longer than expected.