Have done a couple of long rides recently on my old BZ (Before Zinn) bike. Was an interesting excercise.
I've got a bike in my garage that illustrates the proportional length crank philosophy that is one of the cornerstones of the design philosophy of Zinn Cycles. It's not a Zinn bike - but even so - it's still pretty cool...
If you’ve ever done squats in the weights room – you’ll know that you can cheat by not squatting all the way. You can seemingly lift more weight – but it’s a false economy as you don’t get the full strength gains that a deep squat can give.
This year - as a Team Zinn member - I'm going to regularly post short blogs about me and my Dolomite Ti's advances towards my goals for this year.
This past weekend was the Cyclocross Nationals in Wisconsin. Not as much snow as we were used to from racing cyclocross in Colorado this season, and overall a great event. Here are some photos.
I just had dinner last night in Vancouver with two tall (6’7” and 6’9”) Zinn customers, Layne Nadeau and Byron Tokarchuk, and heard inspiring tales of the riding that is now possible for them since they got their XXXL Zinn Gigabikes. The Vancouver North Shore trails are notorious for their steepness, slipperiness, dropoffs, stunts, and general technical challenge. Trails that are labeled blue (i.e., intermediate) on the North Shore would be labeled as double black diamond anywhere else. There are maybe two loops in the area that could be called “cross country” trails; everything else is an incredible network of freeride trails, many of them build high off the ground on skinny wooden Ewok-village-type structures with teeter-totters (even curving ones) in them.
My day at the New Zealand Road Nationals Time Trial was the culmination of a year’s worth of focus.
Kieran Cox is a long time Zinn Cycles customer, and advocate of proper frame design and crank length for tall riders. Here is some interesting data he has developed with our custom cranks.
Finished up our season down here in NZ with our club AGM and prizegiving.
Howdy - I'm Adrian McKenzie - a new member of Team Zinn, from New Zealand. . I took delivery of my new Zinn Dolomite Ti a few weeks back and after a wee while on it, I posted the following review on the www.roadcycling.co.nz website (I've edited it a bit to explain a couple of things that might not make sense to non kiwis - and added a couple of extra photos) ... . And now - for something a little different... . This bike is a little different from most road bikes out there. But its design differences have been tried and tested over many years of building bikes for hard to fit customers. The differences make absolute sense when you ride it - and the proof is in the pudding - when you see the jump in performance that comes with it. . So in light of that synopsis - a little background is needed... . I'm 6'7" and 125kg and and a few broken frames over the years had convinced me that - damn it - I needed to go custom. . A couple of years ago I'd found a company in the US called Zinn Cycles that builds custom bikes - with a focus on building for hard to fit people. The guy behind the company is Lennard Zinn whose name you might recognise from his books - especially one titled "Zinn and the Art of Road Bike Mainenance". And he also writes a regular technical column for the VeloNews website. Lennard is 6'6" himself and his company grew out of his own desire for better bikes and components to suit his own needs when he was a top ranked rider in America. . So here I'd found custom built bikes for tall people built by a tall guy who’s been there and done that, and knows what works. Sounded like the perfect fit for me. . So I got in touch with the team at Zinn Cycles and eventually ordered the Dolomite Ti - which comes from their custom built series called ‘Project Big’. The process consisted submitting a series of detailed measurements and discussing my needs and desires - as well as detailing what sort of riding I’d be doing. It’s a collaborative process, with draft designs submitted and discussed then tweaked as needs be. . So what exactly is different? . Well I guess the best place to start is with the design philosophy of custom length cranks. Experimenting initially on himself - Lennard’s found over the years that proportional length cranks make a big difference in comfort and performance for tall riders (and short ones). The bike is designed around the common sense idea - that a taller rider, with longer legs should be pedalling proportionally the same sized circle as a shorter person. So this means a crank that’s a lot longer than then standard 175mm. They have settled on the formula of inseam x 0.216, which in my case corresponded to a crank length of 210mm! . . Now if you put that sized crank on a regular bike you'd be scraping the ground at the mearest hint of a corner - so what they do is to build the bottom bracket higher off the ground to eliminate any clearance problems. And this has the added advantage of making the frame smaller from the bottom up. It means a shorter downtube, shorter chainstays and shorter seat tube - all big benefits in a big frame. And it's a compact design with the top tube lowered so that the frame is shorter from the top down also - further adding to the strength. . The front end geometry is also different in that there is a relaxed head tube angle to give the bike more fork trail and hence stability. This eliminates the shimmy that commonly affects big frames that often have steep head angles to keep the wheelbase short. The Alpha Q Z-Pro fork they use on all their Project Big bikes, is also specifically designed for Zinn. It has a beefed up carbon steerer that minimises any flex that can occur inside the big head tube of a large frame. . They make bikes out of steel, aluminium and also magnesium - but I'd settled on their flagship model - with a full titanium frame. . So how does this all work in the real world? . Well I took delivery of the bike the day before Taupo! (which is a hilly 100 mile ride round Lake Taupo in the central North Island. Taupo is the premier challenge ride on our calendar - with over 12,000 riders taking on the course). And I figured there was no way I was going to ride Taupo on my old repaired steel bike knowing I had a brand new custom build titanium beast in the garage at home. . So I rocked up the next morning having ridden only about a couple of km's on the bike (and most of that on the way to the start). I was a bit worried about how the bike would perform. Especially since the long cranks felt very weird when I first hopped on the bike. But I needn't have worried as the bike performed beautifully. I started well up towards the front fully expecting to be left behind on the hills like normal - but found to my delight - that I wasn't getting dropped. The long cranks while still feeling a little odd - were enabling me to climb with much more ease and hang with the weight weenies. . Took 30mins out of my best time to record a 4:49 which I was extremely happy with for a 125kg rider on a brand new bike. The long cranks felt more and more comfortable as the ride went on - and I suspect I'll only get better as I get more used to them. They certainly enabled me to get more power on the road. . . And a good proof of that came a week later when I lined up on the start line to take on the clock in my club’s hill climb champs. The 2km Maungakotukutuku hill behind Paraparaumu is a regular lunchtime ride of mine and I had ridden the course at my maximum on my old bike a couple of weeks previously so I could compare to the Zinn. . The proof of the long cranks effectiveness shone through as I beat that time (which was a personal best) on the Zinn by 44 seconds – which over a 2km climb is massive. .