Tag Archives: jay dicharry
Road vs. Cyclocross Bike Fit: what’s the difference?
A lot of hype concerning the difference between fitting a road bike and a cyclocross bike could be cleared up if we all agree on two simple things: put the engine in the right place, and then adjust for handling and comfort. Let’s break this down.
Your pedals are driven by large muscles surrounding the trunk, hips and knees. In fact, about 98.8% of the force you deliver to the pedals comes from your hips and knees. That’s right, the ankle only produces a very small percentage of your total power. So it makes sense to have the saddle height and setback (also called for-aft position) the same between your road and cross bikes to maximize power production. Why would you select a saddle position that compromises power output? Keep it simple. If you like your current saddle placement on your road bike, there is zero reason to change it on your ‘cross bike.
Handling and comfort
Okay, now here’s where things are a bit different. Instead of rolling your slick tire down fresh asphalt, you’ve got to contend with dusty pumice, wet grass, rocks, roots, and the nutrient ‘crossers crave: mud! In short, it’s critical to have a good handling front end. This means that you want to have a little less weight on the front so that you can lift your front end over obstacles easier. Careful though, too little weight on the front end will bring your torso too upright make it hard for your front tire to bite and send you skittering wide towards the outside of the turn. Let’s see how this all plays out in fit.
- ‘Cross bikes typically have a higher bottom bracket. If you were smart, you’d kept your saddle in the same place as your (properly fitted) road bike. This means that your saddle is higher in the air than your road bike. Since your saddle is higher, your handlebars also need to be higher.
- Hand-grip placement for optimal handling: A lot of people rarely use their drops on their road bike. Then when on the ‘cross course, they find that they are forced into the drops on steep downhills to brake and get a better grip on the front end. Most riders find the bike is much more stable when conditions get squirrely if they use the drops. So if you are going to be in the drops, make sure you are comfortable.
So what’s the secret recipe to make sense of it all?
It’s simple really; the goal is to get the bars a bit “closer” to you. And you can do this in three different ways. You can run a shorter stem to move the bars closer, you can run your bars higher (by putting a few spacers under the stem or by using a stem with more rise), or a combination of both. I typically recommend that riders start by raising their bars first (because this usually only means moving spacers or flipping a stem). Setting up the bars with some combination of “up and back” will allow you comfortable access to the drops for good grip and handling, and while still allowing you to have optimal engine placement so you don’t lose any precious watts.
Powerful, sketchy, and somewhat comfortable. Yeap; sounds just like ‘cross racing!
Linsey Corbin’s Lucky 13: kudos from the field
I work with many athletes – and to be honest, I get just as much personal satisfaction seeing a person complete their first 10K as I do helping an elite earn a spot on the podium. I’m always humbled and honored when athletes seek out my help, and even more humbled when they put out some nice footage such like this as a way of saying thanks. I’m really just trying to do my job!
Well, professional triathlete Linsey Corbin is also trying to do her job with a stellar performance in Kona 2 weeks from today. Check out Day 2 on linseylucky13.com to learn what Linsey and I have been working on together.
“In the Highcountry” film premier – this Tuesday night @ Rebound!
PNW premier of “In the Highcountry” is this tuesday night @ Rebound Westside. We’ll be outside under the stars – Show up at 7:30 to hang out with your friends, sip free beer courtesy of Deschutes Brewery, chow popcorn, watch an acrobatics show with the YogaSlackers, and the highlight of the night….the film and a conversation with the film maker – Joel Wolpert. cost is $5 plus a can of food. All food goes to those locally in need, and ALL PROCEEDS go to CORK youth developmental running probrams here in Bend!
In the High Country is an impressionistic mountain running film: a visual essay about a life in the mountains. It looks at running from a new perspective, both visually and in the style of running. This kind of movement blurs the lines between running and climbing, between human and mountain.
One way to learn our place in the world is through millions of accumulated steps: on gravel roads, glacial creeks, and over high mountain summits. Each stride imprints the terrain more deeply in the mind. The importance of any specific event falls away in the face of an ever-building accumulation of understanding.
In the High Country is the result of a year-long collaboration between filmmaker Joel Wolpert and mountain-runner Anton Krupicka. The film follows Krupicka’s evolution in running from his roots in Niobrara, Nebraska, to the Roost, his pickup truck home, and the miles in between; from itinerant shenanagins to speed soloing on the Flatirons.
special thanks to our local sponsors for making this night possible:
REP Biomechanics Lab — Deschutes Brewery — FootZone — Fleetfeet
Ground-breaking news: runners who are faster than you have longer strides
This year, I got to present along an all-star cast at the USATF SPEED Summit in NJ. Basically, the goal is to breakdown the elements of coaching based on science, and then use this science to bolster what we do on track. Smarter plan = better results. Or maybe I should say smarter people help us develop better plans? This is the conference I was most looking forward to this year, and it did not disappoint.
So let’s get past the sarcasm in the title, and go straight to the big picture: if you run slow, you take short strides and your turn over isn’t that quick. The only way to run faster is to increase your turnover and your stride length. So it shouldn’t be a surprise when you hear that faster runners have a longer stride length than slower runners. But now we get into an interesting question…..is stride length the cause or the effect? Or more specifically, why do some runners appear to bound effortlessly over the ground?
They are stronger. About 80% of the cost of running comes from holding your body up against gravity. If you have strength reserves, it’s easy to combat gravity and float from step to step. This extra strength enables more “hang-time” which translates to a longer stride length with less effort. Take home here? Get stronger.
How can you develop running specific strength? You can run. Collegiate and sponsored athletes get two workouts a day, and are racking up big miles. You know what else they do? They lift weights to develop strength reserves. Its highly likely that you don’t have the time and energy to rack up monster miles each week. But take a look at your week. Can you examine your training program and budget 30 min 2x’s a week for some strength work? If the answer is no, take a look back at the Achievement Triangle post…..and ask yourself where you’d like to be. And if you are over 40, this is not optional. Get strong to get faster.
Want more? Check out this reference: Weyand