[2.06 lb] I was hesitant about this rig, but it's super reliable, sable and easy to change the wheels out. everything needed is included.

[5.9 x 4.55 x 4"] good quality..satisfactory

[2.06 lb] I hoped these wheels were of decent construction. They surpassed expectations. I measured the run out on the wheels with a dial indicator and it is well under .001". Nice solid bearings and a thrust bearing on the mounting stud. These will give a smooth ride.

[5.9 x 4.55 x 4"] Awhile ago, I purchased the ProAm USA SolidTrax Universal Track Dolly and was a bit disappointed at its engineering. It was slightly flimsy, did not roll smoothly and the tripod seemed to torque a bit when slid along teh tracks. This is not a personal attack on Proam as I am sure the company founders are great folks. I own their ProAm USA SolidTrax Universal Platform Dolly and like it okay. The Proam dollies are not as good as the Glide Gear system on a few levels. Firstly, the Glide Gear dolly arms are stronger than the Proam and the tripod does not torque. The Glide Gear tripod dolly stays on the tracks and does not jump track like the Proam and you can adjust the Glide Gear arms to different lengths if you want to use different tracks. Plus, Glide Gear gives you caster wheels for smooth floor use if needed. The Glide Gear wheels are smoother rolling right out of the box and I did not have to adjust their tension. I am happy with my purchase.

[2.06 lb] I didn't try them yet but look very heavy. It's a good item very heavy and looks stable; these wheels are also very cheap! We bought 8 to make skate support for a doorway dolly.

[2.06 lb] Using this with 1 1/4 PVC 10 foot piping with the track wheels. Super smooth and stable. As quiet as anything with rubber wheels can be. Fit my tripod very securely. Folds easily. CONS: the bag is small and doesnt fit with the wheels on. The (non-track) wheels are too small even just to transport a tripod. I replaced them with standard 4 wheels from a HW store (still only useful for transport not filming). THere are no assembly instructions - but assembly is easy if you figure out you must use the hidden allen wrench on the hidden bolts.

[2.06 lb] I was building my own dolly. I wanted good wheels. These looked like just what I wanted and needed. The wheels are soft enough and run very smooth on the track.

They are rated at 50 pounds per set. I purchased 6 sets to hold the weight of the camera and operator. They work perfectly.

One note - these are a little soft so they are very smooth on the track. This is done on purpose so the carriage is smooth if it goes over seams in the track. If they are left in one position with the camera weight on it they can get a little impression that will result in a little bump. Just run the carriage up and own the track a few times and it goes right away.

These dolly wheels are very well made, durable and are great to use. They swivel so they can be used on curved track.

I'm very pleased with my purchase.

[2.06 lb] I Build a DIY Silder and the Wheel are really good!

[2.06 lb] I purchased 5 of these for my light stands as well as my video backdrop stands and having had back surgery several months ago it's the thing that still allows me to work in my studio since I couldn't lift any of those stands. I don't use them for tracks so those are not useful to me but game changing for the stands as I frequently have to reconfigure the studio for different use cases. Well worth the money.

[2.06 lb] Item came very fast. I like the fact there are two sets of wheels so I can either roll along a smooth surface or use the other wheels to roll along pipes on a not so smooth ground. Only negative was box showed a tool to use with it which was not in the box and no pamphlet inside with contact info or changing wheels and a few other things. Not a game changer but disappointed int an otherwise superior product.