JMI 5 Inch Large Wheels Upgrade – Universal Style Wheeley Bars

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JMI 5 Inch Large Wheels Upgrade – Universal Style Wheeley Bars

$129.00

In Stock

Upgrade your JMI medium or large wheeley bar system with fully-locking JMI 5 Inch Large Wheels – Universal Style Wheeley Bars.

Also includes three 10″ leveling screws to replace shorter screws on older models.

In Stock

Description

JMI 5 Inch Large Wheels – Universal Style Wheeley Bars

Upgrade your JMI medium or large wheeley bar system with JMI 5 Inch Large Wheels – Universal Style Wheeley Bars.  Includes three fully locking 5″ diameter polyurethane wheels to replace the standard 2-3/8″ hard-rubber wheels on Universal-Style Wheeley Bars (both standard and custom versions).  With these wheels, the Wheeley Bars will raise the mount 6-3/8″ off the ground.

Note:  This item is an aftermarket wheel upgrade option that allows the replacement of small wheels with 5″ large wheels if current wheels are attached with bolts (current manufacturing method) rather than rivets (very old manufacturing method).  With this aftermarket option, purchaser removes the original wheels and installs the 5″ wheels.  (JMI will not accept returns of used small wheels).

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Package Includes:

  • Three 5″ Polyurethane Wheels
  • Three 10″ Leveling Screws

What Size Wheels Should I Purchase?

The small 2-3/8″ hard-rubber wheels are good for flat hard surfaces with no cracks or grooves.

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.

If you are purchasing the Large 10″ Pneumatic Wheel Upgrade for Large Size Universal Wheeley Bars or HEAVY DUTY Medium Size Universal Wheeley Bars purchased before October 2013, please let us know that you need the Long Mounting Bracket.  You can do so by entering, “LONG MOUNTING BRACKET” in the comments field in our shopping cart.  (If you are purchasing the upgrade at the same time you are purchasing the Wheeley Bars, you do NOT need to add this note.)

You can verify the need for the Long Mounting  Bracket by measuring the Threaded Leveling Screw Guide (Long Nut) which holds the leveling screw (see picture below).  Units built before October 2013 used a longer guide/nut which measures about 2-3/8″ and requires the Long Mounting Bracket.  Current guide/nut length (which does NOT require the longer bracket) is about 1-5/8″.