Chain Wear, Crank Lengths & Tubeless Sealant Types | GCN Tech Clinic

I have a LLD of 20mm. Just had a bike fit and my cranks are 172.5 and my shoes were fitted with shims and g8 insoles along with spacers under my cleat Made a huge different to me

High performance motorcycle tyres use a rubber which gets very sticky when it's up to temperature and run at a much lower pressure than bike tyres, maybe 20psi, as they don't have to worry about rolling resistance. This is why they can go round corners leaning not far off horizontally. I've noticed that Continental tyres tend to be a softer rubber than Vittoria, or at least they used to be back in the day, which might be because Germany has a cooler climate than Italy and the tyres are made to have a respectively lower operating temperature.

There's a lot of talk about slowing down road racing to make it safer, which sounds like a good thing if the speed of the equipment has increased at the expense of safety. Tyre manufacturers are still generally prioritising speed and rolling resistance over grip, particularly in the racing scene. Now I'm not suggesting 20psi motorbike tyres, but if the UCI regulated tyres much like Formula 1 do, there is scope for more grip at the expense of rolling resistance. This would also appeal to many casual riders who would rather be safer than faster. It could be interesting to see how manufacturers would design a tyre to maximise grip on a bicycle tyre.

On the subject of UCI regs (I'm getting into full dad-in-the-life mode now), I strongly feel that weight and dimensional limitations should be proportional to the size of the rider; smaller riders' size counts enough against them already without having proportionally heavier bikes, handlebars too wide etc.

A bike fitter will never recommend different crank lengths on each side - only to shim cleats. Not sure what flat pedal users do though, possibly insoles.

The audio quality in your new digs still sucks. Hire an audio engineer.

Always now buy tpu tubes from china with metal valve stems a few grams heavier but you never strip the threads as plastic ones in the question and normally wrap ptfe tape round the core as well

sound is bad

Sounds like your new studio is in the bathroom. Maybe you should try out som new Jingles!

What's up with he hollow sound guys. 🙏

I love Silca’s stuff but their sealant is just too much.

For the problem with uneven leg length... isn't it easier to somehow use either pedals or shoes that are different thickness? I wonder if there are such products made especially for such cases where one of the pedals is intentionally 10-15-20mm thicker, precisely to counter the leg length difference

Different crank lengths will result in a power imbalance. Power is essentially torque x rpm. Rpm is fixed by the bottom bracket. So the longer crank will be making more power. This seems like it's going to cause a lot of other muscular balance issues.

Lycans Do Exist! The formerly aero Ollie is morphing into The Shaggy Dog

The motorcycle with reversed tires only happens with tires that actually can be fronts or rears as well. Mostly on commuter or older bikes, most fast modern motorcycles run a 120/55/17 front and a 180/55/17 on the rear, thus having no need for reversible tires. Some old bike tires do have this recommendation as well, and those are the only ones I would intentionally run the opposite direction on each wheel.

Best advice is to visit your podiatrist for an insert for your shoe to compensate for the difference in length of your right leg.

Schwalbe G-One RS gravel tyres should be installed with the front tyre rotating the opposite direction to the rear tyre. So, as usual, the best thing to do is to check the manufacturer's markings/instrructions.

Sound needs sorting. Not up to scratch.🎤🎧

Hey guys, I have quick release but I would like to convert to through axle but I can’t afford to upgrade right now. As a partial upgrade can I replace the front fork with a through axle fork or is this just stupid??????

I'm having an OCD moment every time I see that chain tangled on the SILCA wax holder. Please unravel it

If someone tells you that you have a leg legth discrepancy, measure them.
Look at "One leg longer than the other? Leg length discrepancy test and strategies"

Your guys have an echo or hollow sound since moving to the new studio….otherwise nice setup

If you change crank length you make your foot describe a circle of a different size. If you shim your cleat, the circle is the same size just further from the ground.

I've had motorbikes for almost 39 years (sports bikes) and have never heard of running the front tyre backwards!

Try thread lock that you use with cars, but from Halfords. Might sort the valve core issues, worth a try

Kids sound like that when they talk into empty tin cans for a laugh

Please change some meds. Something is wrong here

What the heck is going on with Ollie’s hair

Are GCN industry shills for promoting every new technology despite them usually causing more complications with minimal benefits?

Road bike tubeless the pendulum has swung

Use a shorter crank on the short leg side. Shims tont work because at the top the shim makes the crank longer which you dont want..
Speaking from experience..

My bike fitter measured for differences in leg length. A good fitter should

I use RideNow tubes and they come with self stick patches. I've had a few punctures, but find that air eventually finds its way out under the patch even if you clean the tube really well and use a hair dryer to set the patch. My solution has been to put a tiny drop of super glue gel on the puncture before applying the patch. This has worked consistently for me.

I've used cyclocross tires that had arrows in different directions labeled front and rear. I assume this has to do with traction on the driven rear tire vs. steering inputs or braking on the front. Can't be sure, but I think they were Hutchinson.

The constant refrain for minimal gains in speed does grow somewhat tiring. Perhaps a tilt more to the sports riders would be nice. Don't get me wrong, I do like watching racing, but going out on a group ride to watch half of the group disappear up the road and be ready to leave when the rest of the group arrive at the coffee shop. Not very much of a social ride. If you want a racing speed ride, advertise it as such and don't complain if half of the group shows up on E-bikes and drops you.

Could you do a video about wheel balancing and if it is necessary?