JMI Heavy-Duty Medium Size Universal Wheeley Bar Telescope Dolly

JMI Heavy-Duty Medium Size Universal Wheeley Bar Telescope Dolly
JMI Heavy-Duty Medium Size Universal Wheeley Bar Telescope Dolly
JMI Heavy-Duty Medium Size Universal Wheeley Bar Telescope Dolly
JMI Heavy-Duty Medium Size Universal Wheeley Bar Telescope Dolly
JMI Heavy-Duty Medium Size Universal Wheeley Bar Telescope Dolly
JMI Heavy-Duty Medium Size Universal Wheeley Bar Telescope Dolly

JMI Heavy-Duty Medium Size Universal Wheeley Bar Telescope Dolly

Regular price $499.00
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JMI HEAVY-DUTY Medium Size Universal Wheeley Bar Telescope Dolly

All Medium Heavy Duty Wheeley Bars fit tripod tip-to-tip distance of 34 - 42.5 inches

Maximum Load: 300 lbs

Tip receptacle is 2-3/4″ I.D. Will not fit tripods with feet larger than 2-3/4 inches.

The 2 3/8" wheels and 1/2" leveling screws are no longer available on the Medium Heavy Duty Wheeley Bars. The Standard Package now comes with 5" Wheels and the Heavy Duty 5/8" Leveling Screws.

These new style Medium Heavy Duty Wheeley Bars now fit the Losmandy HD Tripod Gen2 (tubular design) for G-8 or G11 mounts. The old Losmandy specific Wheeley Bars have been discontinued.

See doorway measurements for more dimensions and fitting through a door.

JMI HEAVY-DUTY Medium Size Universal Wheeley Bar Telescope Dolly is a portable dolly for your telescope.

Constructed of a sturdy base with locking wheels and leveling bolts, the heavy-duty version is designed with heavier telescopes in mind. Save your back! Our Wheeley Bars create an easier and faster way to move mounted telescopes to and from observing locations.

Easily move, lock and level the complete telescope assembly from location to location without the need to disconnect and reconnect all the electrical and computer cabling during transport. Standard equipment includes Heavy Duty 5/8" Leveling Screws.

This HEAVY-DUTY Version is designed for heavier equipment with the same footprint as the standard Medium Wheeley Bars but with stronger, heavier-duty construction. Because of the increased weight with the same base width, there will be a greater risk of toppling over due to the high center of gravity. To prevent damage from falling over, the equipment will need to be strapped down to the Wheeley Bars. As with all Wheeley Bars, JMI will not be responsible for equipment tipping over.

What is Tip-to-Tip Distance?

To be sure that your tripod or pier will fit a particular Wheeley Bar product, it may be necessary to verify the tip-to-tip distance of the mount.

To determine the full range of your tripod, this measurement is made with the legs of a tripod fully retracted (the shortest length) and spread out completely. To determine the tip-to-tip distance that you will use, you can measure at your preferred viewing height. Remember to deduct allowance for the height of the Wheeley Bars (listed with each product). The tip-to-tip distance is the measurement from the outside edge of the end of a tripod leg or pier foot (where it touches the ground) to the outside edge of another tripod leg or pier foot.

Doorway Measurements

We often get questions regarding the width of our Wheeley Bars to determine if they will fit through a particular doorway. The following information should help in making that determination.

The following dimensions do not apply to Wheeley Bars that have been upgraded with 10" large wheels. For Universal Wheeley Bars with the 10" Large Wheel Upgrade the doorway width must be three (3) inches wider than the tip-to-tip distance.

There are three basic measurements as noted above.
    • The maximum width (X) is measured in a similar fashion as the tip-to-tip distance except that the measurement is made to the outside corner of the legs or leveling screws (typically about 3" wider than the tip-to-tip measurement of a pointed tip tripod mount).
    • The minimum measurement (N) is from the end of one leg to the inside measurement on the opposite side. This would help in determining the narrowest door that the Wheeley Bars could possibly be maneuvered through.
    • A third measurement (W) is in between the other two and gives the width as measured from the end of one leg to the outside measurement of the opposite side.
The illustration on the left shows the Universal Wheeley Bars turned so they can be pushed through the doorway based on the NORMAL width (W) without having to do any special maneuvering.

The second illustration shows the Universal Wheeley Bars being maneuvered by twisting them through the doorway based on the absolute MINIMUM dimension (N).

The third illustration shows the Wheeley Bars being blocked from moving though a doorway because they are positioned such that the MAXIMUM profile (X) is being presented.

Universal Wheeley Bars are called Universal because they are made to be adjustable to handle various sizes of mounts. This means that the measurement we have been talking about can vary depending on the in-out adjustment of the Wheeley Bar legs. The table below shows the minimum and maximum for the different widths indicated by the variable W, N and X.

Width Dimensions for Universal Wheeley Bars
Size Normal Width
Minimum Width
Maximum Width
Min Max Min Max Min Max
Medium 32" 36" 22.625" 25.625" 36" 41"
Medium HD 33" 40" 29" 34" 38" 47"
Large 44.75" 49.75" 36.5" 40" 50.5" 56.5"
Extra Large

What Size Wheels Should I Purchase?

For hard surfaces, such as concrete sidewalks, with seams or cracks, the 5″ polyurethane wheels are best.

The large 10″ all-terrain pneumatic rubber-tire wheels are designed for field use on rough surfaces such as grass, dirt and gravel. However, great care must be taken in maneuvering on these surfaces, particularly when wet, because the wheels may sink below the surface.

We do not recommend using Wheeley Bars on these surfaces under adverse conditions, especially if you have a very heavy telescope.

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Customer Reviews

Based on 7 reviews
JMI Telescope Dolly

Excellent materials. Excellent construction. Beautiful paint job on all parts. Extremely stable, adjustable and strong.
1.Handle is too short.
2. Handle should have padding and a place to rest when not in use.
3. There should be a place to put stuff to hold to not get lost like the rubber foot pegs when securing to soft ground, lens covers, telescope covers,
4. The four tires in the back make it difficult to turn because always one set of tires are skidding sideways.
5. The turning wheels at the front rub against the frame making tight turns impossible and their dragging on the frame make it hard to pull.
All easy to fix.
1. Handle longer. Add an accessory cover for the handle.
2. Have an accessory like the battery holder that is a nice size rectangular bin to put stuff in.
3 If the front turning axel is installed underneath the front cross beam with enough clearance for the tires then you could have a very tight turning radius. For the back tires, just turn the axel bracket over. The only way to fix the extra rear tires dragging side ways is to caster two of them.

Dale Emanuel

Very sturdy and durable. Glad I ordered the 5 inch wheels. Very easy to move around

Roger Robertson
Works Great

Just what I was looking for and very good quality. I can leave my Celestron 9.25 with wedge fully assembled and roll the the rig right of the garage on those 10" wheels and view those nice Texas Hill Country skies,

John Kayne
Great pre and post sales support Wheely bar purchase

Great pre and post sales support. Lisa was very helpful in making sure my order matched my astronomical needs. Will be buying from them again.

JMI Heavy-Duty Medium Size Universal Wheeley Bar Telescope Dolly with 10" wheels

Overall I love the Heavy Duty Wheeley Bar with 10" wheels. Very solid build quality and it makes my setup so much more useable due to ease of transport between back yard observing location and storage in the garage. The only feedback I have is I find the turning radius a bit limited. The front wheels hit the front leg at a pretty small turning angle. A little more clearance their would help with maneuverability but a few extra jogs when positioning is a small price to pay for the ease of transport. One other thing I did was I stretched sections of an old bicycle tube over any place the tow handle could hit the dolly or my tripod when in the up position. Just a little extra padding to avoid metal to metal contact.