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CMI Micro Velocity Cable Trolley - #MICROTROLLEY


CMI Micro Velocity Cable Trolley - #MICROTROLLEY
  • USUALLY SHIPS: 1 - 2 Days
  • Made in the United States of America!
Purchase over $300 of CMI products and use Promo Code: CMI10 to receive a 10% discount off your order total! *Restrictions may apply

Product Description

  • Stainless steel sideplates
  • Stainless steel sheaves
  • Ball bearings
  • Stainless axles
  • Use with rope or cable


5" x 3"
Frame Size
Micro / Compact
Wire Rope Size
1/4" - 5/8"
Rope Size
1/4" - 5/8"
Sheave Size
Stainless Steel
Breaking Strength (lbs)
Weight (lbs)

Questions & Answers

2 Questions & 2 Answers
from Caldwell, OH asked:
July 22, 2021
Does the CMI Microtrolley require a second carabiner for safety reasons?
1 Answer
Here is the answer from the factory:

We strongly recommend the use of a backup carabiner for two reasons.  When used in tandem with our trolley lanyards, the lanyards have both a primary and secondary backup system which integrates with the Microtrolley.  So, in the worst case scenario, if the primary lanyard were to ever break for some odd reason, there would be a safety backup lanyard to catch the rider.  Is it required; no but is it recommended, absolutely.  CMI has never had a catastrophic failure with any of our trolleys and we were in fact the first on the market to use the safety backup with the second hole on the back of the trolleys.  It was not our trolley but we are aware of a competitor's trolley that had a catastrophic failure and came completely apart (this trolley had no safety backup hole).  Unfortunately the person riding that trolley did not make it.

Aside from the trolley lanyard with the backup, it may be worthwhile taking a quick look at the trolley itself.  Assuming the rider is using the safety backup carabiner in the rear hole, three things would have to happen to have a catastrophic failure of the trolley.  Both axles would have to shear and the backup carabiner in the rear of the trolley would have to wear away and come off.  Lets assume for a moment that both axles came out.  All that would be holding the rider on the cable would be the backup carabiner.  Some of the ziplines today are very high off the ground and are also very fast.  Having every safety precaution in place just makes good sense.  Some things in this world are replaceable but a human life is not one of those things.  We strongly encourage the use of the backup hole on the CMI trolleys as it just makes for a safer ride for the participant.

Submitted by: WRS on July 25, 2021

from Marshall, MO asked:
May 22, 2020
I'm building zipline out of 400 feet of 5/8" crane cable.  What pulleys will work on this cable?
1 Answer
This trolley will work with 5/8", you just have to choose the drop down when you order it.  The two trolleys below also work with 5/8" cable.

CMI Classic Cable Trolley

CMI Professional Canopy Trolley

Submitted by: WRS on May 22, 2020

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Safety Notice

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Although Westech Rigging Supply strives to manufacture and sell the highest quality rigging and safety gear, use of the gear is dangerous if not used correctly by competent trained professionals. Westech Rigging Supply disclaims any liability resulting from the misuse of its rigging and safety gear. Please take a moment to more thoroughly review our disclaimer.

Westech Rigging Supply rigging and safety gear is only intended to be used by competent trained professionals. Misuse of the rigging and safety gear can result in serious injury up to and including loss of life. As such, Westech Rigging Supply disclaims liability for any misuse or incorrect product selection by our customers.

Rigging and safety gear purchased from Westech Rigging Supply should be used in strict accordance with all industry and OSHA standards. At no time should rigging or safety gear be used beyond its certified load ratings (aka Working Load Limits). Normal wear and tear should be expected with use of rigging and safety gear; therefore, all gear should be thoroughly inspected before each and every use. Worn or unsafe rigging and safety gear should never be used.