Leveling Screws and Hardware Upgrade for JMI Wheeley Bars, Triangle Style for 8″, 10″ & 12″ Dobsonians

The JMI Triangle-Style Leveling Screws & Hardware Upgrade Kit adds 5/8″ leveling capability to a JMI Triangle-Style Wheeley Bar (for 8″, 10″, and 12″ Dobsonians). It includes three heavy-duty leveling screws plus the mounting hardware needed to install them on the Triangle-Style frame. Made in the USA by JMI (CXB Astro family).

Product Overview

Out of the box, a Triangle-Style Dobsonian dolly rolls on its wheels alone. This kit adds three 5/8″ leveling screws so you can level the platform in seconds before a session. The kit supplies threaded inserts that bolt to the frame's existing mount points, plus the fasteners; the leveling screws then thread into the inserts.

Who It's For

Owners of a JMI Triangle-Style Wheeley Bar (8″/10″/12″ Dobsonians) who observe on a pad that isn't dead level. If your rocker box pitches on an uneven surface and the field drifts while you track by hand, this kit fixes it.

Key Features & Design

• Complete leveling kit: Three 5/8″ × 10″ leveling screws plus all mounting hardware for the Triangle-Style frame.
• Heavy-duty 5/8″ thread: The current JMI HD standard — carries the platform load without flex, and matches 5/8″ accessory threads.
• Fast field leveling: A quick twist of each knob levels the platform before you start.
• USA-made by JMI.

Why Leveling Matters on a Dobsonian Platform

A Dobsonian tracks by manual nudging — nothing compensates for a tilted rocker box. If the platform is off level by even a degree, the eyepiece field drifts faster in one direction and you spend the night chasing the object. A few seconds with the leveling knobs at setup fixes that for the whole session and makes the manual tracking motion predictable across the sky.

Compatibility and Accessory Notes

• Triangle-Style only: Sized for the JMI Triangle-Style Wheeley Bar (8″/10″/12″ Dobsonians).
• The 5/8″ thread matches JMI's HD-standard accessories, so the 5/8″ Speed Dial Drill Adapter works for powered leveling.
• Pairs naturally with the 5″ Lockable Caster Wheels upgrade for the full Triangle-Style ground-game.

Important Limitations

• Not compatible with Universal-style Wheeley Bars (different frame and mount points) or Sky Trekker models.
• There is no 1/2″ version of this kit — Triangle-Style leveling is 5/8″ only.
• Installation requires basic hand tools; most first-time installs take 15–20 minutes.

Frequently Asked Questions

What's included exactly?
Three 5/8″ × 10″ leveling screws plus the mounting hardware — threaded inserts that bolt to the frame's existing points and the fasteners to hold them. The screws thread into the inserts once installed.

Does the Triangle-Style bar come with leveling screws?
No — the Triangle-Style focuses on rolling and transport, and leveling is an upgrade. If your pad is reliably level you can skip it; if it has any slope, this kit makes manual tracking far more comfortable.

Why 5/8″ and not 1/2″?
5/8″ is JMI's current heavy-duty standard — more load capacity, less flex under a heavy Dob, and it matches compatible accessories like the drill adapter. There's no 1/2″ version for the Triangle-Style.

How long does the install take?
About 15–20 minutes the first time with basic hand tools. Bolt the hardware to the frame's mount points, then thread the leveling screws in by hand.

Bottom Line

A USA-made kit that adds three 5/8″ leveling screws and the mounting hardware to a JMI Triangle-Style Dobsonian dolly — the under-the-hood upgrade that makes manual tracking feel right on an uneven pad. Triangle-Style only; pairs well with the 5″ caster upgrade.