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Tandem Pulley | 
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| Brand: Petzl
Category: Sports
Buy New: $55.95
Where applicable you'll select size, color, etc. after you click the buy button.
Rating:  3 reviews
Sales Rank: 33180
Media: Misc.
MPN: P21
ASIN: B003NYI8EA
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Product Description
The Petzl Tamdem is a double pulley for Tyrolean traverses on rope. PRODUCT FEATURES: Aluminum sheaves mounted on self-lubricating bushings for efficiency Accepts up to three carabiners to facilitate use For use with ropes of maximum diameter 13 mm Sheave diameter: 21 mm Efficiency: 71 % Working load: 10 kN P21 , PETZL TANDEM PULLEY , PETZL , TANDEM PULLEY , zipline , tyrolean traverse
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| Customer Reviews:
 great for fun, durable, stable June 28, 2010
Mom of Many (USA)
We are ordering our 2nd petzl tandem pulley after 3 years of outdoor 24/7/365 days of use. One of the self lubricating bearings finally gave way to corrosion. We have used this for fun on a 300 yard cable zip line for all of our kids. They have had sleepovers and out on the line for hours and hours.... We bought a Kettler baby/child seat/swing, a disk seat and stainless steel handle bars that are all meant for hanging by a carabiner. Cheap fun for a budgeted family and they get fresh air and exercise also. The kids love the thrill of the ride, just make sure you study the degree of drop from the high to low point and we put a tire and stop block at the bottom for stopping assistance but hang on! Men up to 250 lbs have used the line and I'm sure it would have lasted much longer had we not left it out in the weather on the coast year round. It says for ropes but we have always used it with cable and works fine, a little more noise and maybe even a little slower but I can't see the need for the restriction....
Durable and Easy to use. June 12, 2010
David Freedman (Florida)
We use this for our zip line in the backyard. It works fine and looks like it will hold up well to the elements.
 Nice product but not for a zip line August 24, 2009
J. Hoppenworth (Alaska)
13 out of 13 found this review helpful
I bought this product for a tree house zip line, though I didn't know if it was appropriate. There was no information at Amazon and I didn't find any other information source either. But the price was right and it looked like the trolleys advertised on zip line kit websites. When the product arrived (several days sooner than Amazon promised), the small instruction booklet was nifty, with diagrams for safe and proper use that could be interpreted easily no matter what language you speak.
Only one problem: the diagrams all showed rock climbers using the trolley to traverse their supplies or themselves over small canyons or gaps. The instructions also stated that this trolley was not for use with cable, only for use with rope.
The level of anticipation at my household had already built to such an extent that there was strong reluctance to turn back. The trolley appeared to be workable and so we moved into the testing phase. It easily handled our bucket with 60 lbs of weight. Test Two, it handled Dad just fine, a very fast ride, and we discovered some brake issues related to that. Once the brake block and bungees were upgraded, we moved into operation mode. It has served my kids well most of the summer.
However, our northern summer is short, and the trolley is trashed. The cable bit into the trolley wheels and ruts developed there. There is now a strong likelihood you get stuck halfway down, hanging well above the ground. We will have to find a tougher trolley next year. I wish I had more information when I bought this one.
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