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RSchultz Consulting Bicycle Industry Consultant

WHAT CAN YOU TELL ME ABOUT ROTOR (Q / QXL) RINGS?

Posted on Apr 29, 2016

As a Bike Fitter and USA Cycling Coach, one thing I get asked all of the time is “what can you tell me about ROTOR Q-Rings and will they work for me?” The short answer is yes. Q-Rings will work for most people, but, there are several exceptions which I will go over later. For those that don’t know what a ROTOR Q-Ring is, it is an elliptical chainring that helps increase your performance by varying drive-train resistance during pedaling. ROTOR’s elliptical rings maximize the strong muscles and minimize resistance during the weaker part of the pedal stroke. During one complete revolution of the crank, the cyclist experiences 2 ‘dead spots’. One is located at top-dead-center (TDC), the other at bottom-dead-center (BDC). This occurs at these 2 spots because you are not pushing anymore on the down stroke leg but not yet pulling up for the up stroke. In other words, these 2 points in the pedal stroke are where you are transitioning from pulling to pushing muscles on the ‘upper leg’, and transitioning from pushing to pulling muscles...

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THE BEST CYCLING SPECIFIC INSOLE? PART I

Posted on Nov 18, 2015

THE BEST CYCLING SPECIFIC INSOLE?   PART I A while ago, I did several tests and authored several articles on insoles, including Shimano’s new insole for their SH-R320 and follow on SH-R321, as well as an indepth test and writeup on G8 Performance’s 2600 PRO and IGNITE insoles. All three of these insoles have held up pretty well but are now starting to show major signs of wearing out. As a professional bike fitter and USAC Level 2 cycling coach, I see clients almost every day. Two things that most have in common are (a) worn out cleats and (b) worn out insoles. I have decided that it is in my clients best interest that I carry both of these items so we don’t have to stop the bike fit while they run all over town to find some cleats and insoles. The cleats are easy. 90% of my clients have Shimano pedals, 5% Look and 5% Speedplay. Insoles on the other hand have proven to be significantly more complicated to evaluate. The reasons are many and are discussed below....

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To ICE or NOT to ICE?

Posted on Oct 29, 2015

There’s been several articles lately, including from Dr. Mirkin which state that ice is not the recommended treatment for the athlete anymore. Re-reading these articles, they appear to be more in-line with an athlete that has torn something and not referring to, for example, a cyclist that has had a hard workout and needs to recover as quickly as possible for the next training session. I have spoken to several Doctor’s of Physical Therapy, DPT’s, and they said that this non-icing belief has come from people doing it wrong. Here’s what one Physical Therapist had to say, “The debate over ice is because many people use it the wrong way. When you break down muscle after exercising or tear any structures in the body it needs to heal. The healing process takes blood  to the area in order to bring the area nutrients the body needs to heal/recover. This blood creates swelling. This swelling is good TO A CERTAIN EXTENT. If there is too much swelling it can actually prolong the healing time resulting from an injury. Ice helps...

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Praxis Works Conversion Bottom Bracket – PART 1...

Posted on Aug 10, 2015

    — PART 1 —    Just like with Consumer Reports, a lot can be said about actually buying a product to test. In this case, the tester is not beholding to the manufacturer. I bought this bottom bracket through my own funds and will share an honest review of my thoughts and experiences. On a second note, this seemingly simple review turned more complicated than originally thought due to ‘bearing issues’ which you will read about in Part 1. This article was originally going to be a short 2,000 word maximum review on the Praxis’ Bottom Bracket solution to the creaking and squeaking seen in most press-fit bottom brackets. Part 2 will review the Praxis technology.   INITIAL OBSERVATIONS   Since there are several versions of this bottom bracket available (pictured above), you will need to make sure that you pick the right one for your application. Praxis currently supports SHIMANO, SRAM and CAMPAGNOLO in BB30 and PF30 in 68mm ROAD and 73mm MTB as well as Specialized OSBB. To make this selection even more complicated, frame...

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Having the Best of Both Worlds (Gearing)

Posted on Jul 15, 2015

OPTIMAL ROAD GEARING (for the rest of us) BACKGROUND Shimano’s latest Ultegra FC-6800 and Dura-Ace FC-9000 cranksets offer combinations not available by any other manufacturer. Shimano’s 4-arm pattern is designed so that there is no need for separate 110BCD and 130BCD cranksets. WHAT IS BCD? – BCD, or Bolt Circle Diameter is the diameter of the circle formed by the stack bolts. Stack bolts are the small bolts that hold the chainrings to the spider of a crank. In the past, most bikes came with full-size/standard gearing, mostly 53/39 chainrings. In order to support these larger rings, a 130mm BCD bolt pattern was used. The problem was that if 53/39 gearing was too big for you, the only option was to go out and buy another crankset, a 110BCD with 50/34 chainrings. This was called a ‘compact’ crankset. Shimano did away with all of this nonsense by redesigning their latest 6800 and 9000 cranksets to take ANY of their gearing, meaning, buy 1 crank set and you can easily interchange virtually any chain rings to achieve your needs. I say virtually since Shimano recommends a 16Tooth maximum difference between the large...

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Dura-Ace Shift lever buttons now turn Shimano CM-1000 camera on/off!...

Posted on Jul 15, 2015

Here is main page – http://shimano-sportcamera.com/us/application.php But, in order to make this work, you will need to pair the camera to your Di2. It took a little finesse, but here are the steps to make it work. Just tried it, finally got it to work. Here’s the secret to pairing. 1) Update phone app software (latest 1.3) 2) update camera firmware (latest 1.2) 3) update e-tube project software (latest 2.10) 4) update Di2 components on bike to their latest versions 5) turn on camera and its Wi-fi 6) connect phone to camera Wi-fi 7) bring up camera app on phone and go to settings | pairing sensor setting 8) disconnect di2 battery (on bike) and leave unplugged for 30 seconds 8a) or disconnect/unplug EWW01 9) reconnect battery or eww01 10) shift FD a couple times to make sure di2 is awake 11) slide PAIR Di2 on phone app That should do it!!! Here are the official changes…. Version 1.3.0(2015/7/10) For even greater ease of use, the following SHIMANO SPORT CAMERA functions have been added or changed: ◦It is now...

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Female Cyclists ‘In’s and Out’s’...

Posted on Jan 21, 2015

Or, What’s the Best Saddle-type for a Female Cyclist? Reprinted from Cobbcycling.com The quest for a comfortable bike seat has probably been going on since the second day the bicycle was invented. It is the search for the Holy Grail, the quest for the answers to the Universe, the only thing stopping World Peace, it is on every person’s mind that straddles a bicycle. How can something as enjoyable as riding a bicycle, bring so much discomfort and still be overlooked or just accepted as being okay for that situation. For men, there seems to be a tendency to just “suck it up”, more miles will make it better and to just ride through the pain. Men have certain body parts that require different types of arranging to find comfort without getting crushed, women have a completely different set of issues. For women, the concept of suffering through it, is not that pleasurable, the thought of hours in the saddle has kept many women away from the sport. As a saddle manufacturer, we get many e-mails and phone calls...

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In case you were wondering … Gear Numbers

Posted on Jan 17, 2015

This can be viewed as a TECH NOTE for the cycle computer manufacturers as well as the GPS manufacturers. Last week I was testing several different GPS head units and cycle computers that ‘talk to’ Di2. But, after comparing the data, I noticed that something just wasn’t right. But let me take a step back. The Shimano D-fly wireless transmitter sends several pieces of data to ANT+ devices. These data of importance being Di2 battery level and gear position (front gear number, rear gear number). Its up to the cycle computer/GPS to take this data and display it in a value added format such as a graphical representation of what gears you are currently in and by recording time stamps, can tell the cyclist what % of the ride he/she was in what gear. So what’s the issue? After entering (a) Cassette Model 9/10/11, (b) Cassette type (11-23, 11-25, 11-28, etc.),  and (c) Crankset Type (50-34, 53-39, etc.) into your cycle computer/GPS, it has enough information to display all kinds of data for you. And that’s the issue. In this example,...

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