For our large horses, 16.2h wheeler, 1500# when fit, 17h leader, 1400# fit. Both wear an 84 inch blanket and it fits well. Add in 3ft for neck and head length, to get a true picture of horse size, big and LONG! Reins we used were 29ft, 1 inch or, 8meters and 80cm. This was a good length, gave us some extra leather, whatever vehicle we were hitched to. Traces were from our regular team leaders from the 4-in-hand harness. We hitch our leaders long in the team. We will canter our horses and want enough room between. Traces were 96 inches, including the D end, to trace tip. Leader wore a pair breastcollar, which would put the trace buckles back farther on body, than a single horse breastcollar would. NOTE THIS!! Gives us even more length. With the over girth and support strap, instead of tug loops or trace carriers on the saddle of single horse harness saddle, pair breastcollar stayed pretty quiet. I must correct my other message. Our leader bars are made of round aluminum. Not the square steel I said before. Husband has have made a number of singletrees of square stock, and I got confused when remembering. He said he used the heavywall, aluminum, electric conduit. It appears to be 1 1/2 outside dimension. On the SET of leader bars, I am going to call the one a wheeler bar and the other, the leader-side-bar, so we can seperate them for description. The wheeler bar is 21 3/8 inches, end to end. There is a pair of metal collars at each end to hold the straps in place, that go back to the wheeler traces. The space between the metal collars is 1 3/8 inches, for a 1 1/4 inch strap. The straps on the bar ends add stability to the wheeler bar and transfer the load straight back to wheeler traces when leader goes into draft. Leader-side-bar is 24 inches end to end. It has a 2 inch clevis on each end which anchors the 3 inch snap shackles(quick relese shackles). Clevis is set in a hole 1/2 inch in from end of bar. This leader-side-bar has a thick, flattened end for the clevis hole. Both bars have an added piece of metal, resembling a large footman loop in the center of each bar. It has about 3 1/4 inches opening, to pass the connecting strap under. We have connecting strap between bars, going all the way around the bars. This loop keeps the connecting strap centered on each bar, with connecting strap bolted closed in the center, between the leader-side-bar and wheeler bar. Heavy connecting strap must be able to take the load when leader goes into draft. Our connecting strap is quite thick and 3 inches wide, to fit under the loop. The width is very helpful in preventing independent swinging of the two bars. We also padded our bars so there would be reduced impact, if bars should hit anything by accident. The snap for D-ring center of breastcollar harness, is about 3 1/2 inches to bar. The space between the two bars is 1 1/2 inches. So if you add it all together it comes out, D-ring on breastcollar, 3 1/2" snap, 1 1/2"bar, 1 1/2" space, 1 1/2"bar, plus 3" snap shackles. So I make it about 11 to 13 inches distance that the leader bars add, between wheeler's chest and leader traces D-rings. Snap shackles hang may hang down long, but they are seperate from the bars themselves. Bars are pretty close to wheeler's chest, reduced swing. Perhaps the snap shackles weight helps? We just did not have much swing, whatever we were doing with this Tandem. The worst swinging leader bars I have seen, were thelong, lightweight wooden ones, used in Carriage driving. Trace carriers on leader were of a length to carry traces level from leader's breastcollar. We do not use the belly straps. Trace carrier is fixed on the backstrap, so one side doesn't get longer or stuck. We use the loose, hanging Roger rings, not the rings on the browband. Should be large, at least 3 inches, so reins run freely. Tie the bottom of the ring down, to prevent wheeler flipping it around. I like the rings by the blinkers, but reins will still catch under blinkers sometimes. I just don't want a rein in the eye. Whip lash should reach the leader's saddle. You can add length to a regular whip by adding parachute cord, pretty light. Expensive tandem whips are NOT for daily use, BREAK easily! Get as long a stick as possible, and add enough cord to reach the leader. Practice using the whip, you need to be able to put lash where you WANT it to go. Adjust the whip balance to make it light in your hand, you can weight the butt end to counter the lash weight. Shorter stick will work too, just takes more work to get lash where you want it. You don't want a tired hand from whip weight or poor balance. I don't know if you can reduce the measurments to make it work for smaller horses. Lot of fitting is trail and error as you work the horses. We wanted room, leader is fast and big. Smaller horses would have other factors to consider. Husband drives the Tandem with rein twitches, compared to the Team, with loops! Kathy Robertson __________________________________ Do you Yahoo!? The New Yahoo! Search - Faster. Easier. Bingo. http://search.yahoo.com _________________________________________________________ To Unsubscribe, change to Digest or Vacation mode go to: http://www.drivingpairs.com/dpmem.html `````````````````````````````````````````````````````````