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Diamond Back Zonal Frame(3 posts)

Diamond Back Zonal FrameMartin Smith
Jun 8, 2001 10:54 AM
I am thinking of buying a Diamond Back Columbus Zonal frame for general riding and some time trials. Anyone know if they are any good?
re: Diamond Back Zonal FrameThe Kid
Jun 8, 2001 2:35 PM

The frame you are referring to is not sold in the United States, so the number of replies to your message will probably be few. I assume that you are considering a frame similar to the one used on the Diamondback Hockenheim road bike, which normally comes in yellow.

The frame has a slightly sloping top tube, smooth welds and 1 1/8" non-integrated headset. I may be incorrect, but I believe that the frame is made in Asia, probably Taiwan. This is not to say that it isn't of good quality, though.

My experience with European Diamondback road bikes is with the top level Monza model, which at the time that I rode one (1999-2000), was made in the Billato Telaio shop in Italy. A very light, responsive bike that, surprisingly, had downhill handling manners to match its uphill efficiency. At that time, sloping top tubes had not been incorporated into the design, but the smooth welds and Columbus tubing are the same as the 2001 model.

My only complaints were lack of tire clearance because of the short chainstays (even 700x23 was a tight fit) and lack of a replaceable rear derailleur hanger. I believe that both issues have been addressed in the current model.

The frame will probably serve you very well for the general riding you describe. It's not purposely designed to be ultra aerodynamically efficient, but careful selection of forks, wheels and other parts could make it suitable for time-trialing. I say, as long as it fits you well, go for it!

re: Diamond Back Zonal FrameMart
Jun 9, 2001 3:55 AM
Thanks for that. It is actually the Hockenheim frame that I am thinking of getting. I am in the UK hence why I can get hold of one. It has got a slightly sloping top tube but this makes it a little bit harder to get the size right. I am returning to road biking from a lazy spell and would normally ride a 54cm centre to centre frame (probably just under 22in centre to top.). I am still considering my options as I have just read the review of the Cannondale R800 and like the sound of it - only trouble is it costs quite a bit more.