Lascauxcaveman 

Longtime DF rider, here; 50 years. I was recently given this EZ Racer trike and am slowly replacing cables, etc., just waiting for a couple miles of chain to arrive in the mail to make it rideable again. I was pleased to find out the seat goes back plenty far to accommodate my long legs.

I live in hilly country and get great enjoyment from my 40+ mph descents on a regular basis on my DF bikes.

I'm guessing that's not going to be doable on a rig like this, is it?

[url=https://flic.kr/p/WBkWnd]

Trsnrtr

Don't know about that particular model but I've had every trike that I owned over 50 at one time or another. They were all tadpoles:

2005 Cat Speed
2006 Cat Speed
2006 Cat Road
2009 Cat 700
2013 ICE Vortex
2004 Windcheetah

mobilemail

You might do okay on a straight run, just feel it out. But if you have to corner at speed, definitely cool your jets.

VegasTriker

If you want to do fast downhill runs on a trike, pick one with a low center of gravity. This is not one of them. It must be a bear to pedal 67 lbs back up the hill too. Here's Bicycleman in Alfred NY's description of your trike. Note the part about "stable at slow speeds" and "it’s high-speed handling is poor-to-unsafe". This guy sells them so he ought to know.

The EZ Tri Classic is very comfortable with a large cushy seat. It is a good trike for someone who needs exercise and local transportation but doesn’t think they have the strength or coordination to ride a two-wheeled traditional bike or recumbent. It is slow and heavy but stable at lower speeds.

The EZ Tri Classic seat is high enough to make getting on and off easy. We have had customers with medical conditions such as Parkinson’s and severe arthritis that thought they wouldn’t be able to ride who found the EZ Tri Classic a joy. One rider’s condition forces him to walk with a walker but he was able to enjoy the EZ Tri Classic on his first ride.
Its low-speed handling is very easy to get used to. It is easy to get onto and off of, even for some riders who have trouble walking. One of the nice things about a trike is low-speed stability. You can climb as slowly as you like and not fall over, and you can stop for a rest without getting off. We can give it custom low gears to make it climb any paved hill.
It is heavy at 67 lb and not the bike for someone who wants to go fast, even on descents. After taking a sixteen-mile ride on one I have to report it is even comfier and not as slow as I had expected. Over 20 mph it’s high-speed handling is poor-to-unsafe. Its high-speed emergency handling is terrible. The front rim brake and rear disk brake work well, you shouldn’t have any trouble keeping your speed down. The rear brake pulls the bike slightly to the right.

Lascauxcaveman 

Interesting, but possibly describing a different trike? There's no way in hell this thing weighs 67 lbs. I have not hung in from my scale yet, but just by picking it up my guess is 45 lbs. I've got loads of DF framed bikes between 22-32 lbs, and I'm a pretty accurate weight guesser.

As I mentioned, I haven't actually ridden it yet; no chain.

Juan Foote

That is a flatland, park cruising machine. I wouldn't attempt to get it to half that speed. Much too high center of gravity. Even on low trikes it is necessary to lean in tight corners to keep from tipping over.

BlazingPedals

The review here, which is for the latest model, says 56 pounds. It says it's suitable for light touring; but I couldn't imagine doing a multi-day supported tour on one, nor have I ever seen one on such a tour. Where I have occasionally seen them is on a one-day, half-metric, supported ride.

Recumbomatic

Not a speed machine, but looks like an excellent grocery run, beach BBQ & small dog hauler bike. If you can find a suitable fork, the 16" front wheel can be replaced by a 20" with only a small change in handling.

VegasTriker

It is exactly the trike pictured on the Bicycleman website. Read it yourself here: Sun Trikes Archives - Bicycle Man or see the review on this site: Sun Seeker EZ-TriClassic SX - Brands Cycle and Fitness where the pro comment was "great exercise" and the con was "heavy and slow". Nobody is claiming it isn't a perfectly usable trike under the right circumstances. I used to frequently come across a guy riding one but haven't seen him in a while. He rode it about 10 miles a day but not in a hilly area.

JanMM

See how it does at 15-20mph before deciding whether or not you want to try any fast downhill runs. I would guess not.

rando_couche

No no no. For high speed descents, you want one of these:

BlazingPedals

A 40 mph downhill on an upright bike would be a 45-50 mph downhill on a lowracer. I've been known to coast past furiously-pedaling tandem teams on a good downhill. And before anyone says a lowracer is too low, the trike above sits at about the same height as my NoCom.