Is There A Maximum Speed Bike Tires Can Go? | GCN Tech Clinic #AskGCNTech

Can you fix a latex inner tube? Why don't the big groupset manufacturers make OSPWs? Why do bigger disc rotors brake more efficiently? Alex and Ollie are joined by special guest Geek Ollie to answer your burning tech questions!

Chapters:
0:00 - Intro
0:20 - Can you fix a latex inner tube?
1:09 - Any tech tips to help me prep for a 100km ride?
2:44 - Why don't the big groupset manufacturers make OSPWs?
5:46 - Why do bigger disc rotors brake more efficiently?
6:39 - Is there a maximum speed for bike tires?
8:00 - Will there be a mechanical version of the new Shimano 105?
9:14 - Does the gap between the dropouts limit my gear choice?

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Do you have any pressing tech related questions? Ask them in the comments below with #AskGCNTech, and we'll get back to you in a future tech clinic!

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[gcntech]

Do you have any pressing tech related questions? Ask them in the comments below with #AskGCNTech, and we'll get back to you in a future tech clinic!

[anthonypink]

I never comment on videos made by yourselves but this gcn tech show was really good you didn't get swayed by your sponsors it was an honest show. Well done.

[billkallas]

I've repaired latex tubes in Vittoria tubulars using a very small 5mm patch, and normal tire patch glue, but it looks like these tiny patches aren't sold anymore.

[glennreed]

A Park Super Patch sticker works fine for latex. Prepped the area with isopropyl alcohol, stuck the sticker. Two years on, no problems.

[MisterE]

The best show AND channel on Youtube!!!

[marcvb]

You can repair any latex tube with normal patches and glue. Has never failed me.

[beneyckmans]

Throw 10ml of sealant in the latex tube and it’s fixed as long as it’s not a huge gash. Done this a bunch on times and works every time!

[richardharris]

For a mechanical groupset alternative to 105, I'd suggest Sensah Empire. Trace Velo, China Cycling, and others have reviewed it, favourably. I get along really well with mine.

[rogerafurness]

Hi Tech Team, on the SRAM tyre pressure website one of the questions is - What Front and Rear tire casing do you have, 1) Standard 2) Reinforced 3) DH Casing / Double Ply. What is the difference and what should I choose as I run Pirelli Race TLRs? #AskGCNTech

[rudolphpyatt]

I’d like GCN Tech to do something on internal gear hubs. They aren’t just for Dutch upright bikes and commuters, and lots of us have converted single speed road or track bikes to three speeds.

[plepgeat]

When I bought Garbaruk's Shimano GRX 11-50t cassette and long cage for my Diverge Comp E5, I threw in their oversize pulleys because there was some sort of package deal and they hardly cost me a thing. Not any faster for me, but they're gorgeous - and they stay REALLY clean compared to the Shimano jockey wheels.

[ltrtg]

In the last question. If the rear hub is 8, 9 or speed hub. The Shimano 11x34 cassettes are concave on the back. To fit the shorter freehubs.

[TheElectroSwitch]

On the groupset and oversized pulley, it's likely the patent required is owned by someone else either Ceramic speed or so and other brands are looking for ways to optimise performance that doesn't infringe on the patent owned.

[stevek]

If it's 50° c I'm not worrying about my bicycle tire, the bike is too hot to touch!
Great episode, thank you.

[maikszczerbuk]

#AskGCNTech at which speed would you recommend stop pedalling and going full aero? In regards of getting fast and/or saving energy.

[chrisbuttine]

I've been repairing latex tubes with Rema patches since the 70's in tubulars and over the past 10 or so years in clinchers. I've used both 20 mm and 25 mm patches depending on tube diameter. Also, have found latex tubes are easier to patch than butyl as the latex tubes have no seams. I don't recommend using sealant in a latex tube as the hole in the tube will eventually develop into a tear. Also, don't recommend using new or patched latex tubes on long descents -- learned this while living in the Colorado Rockies. This would be true for the newer plastic tubes too. However, when living in relatively flat Texas, and even in the Hill Country, the descents weren't long and windy enough to cause an issue due to rim brake heating the tire. In CO the rim would be so hot from braking while descending if a tube blew had to wait for it to cool down to replace the tube. Disc brakes would be the way to go.

[RolandPhilipp]

l don't know what was different or if anything was different but I very much enjoyed this video. I enjoy them all but this one was unusual. Great work, keep going.

[yijuntey]

interesting concept, i've never actually thought about this

[ThePetera]

Oversized Pulley Wheels:
The more the chain is angled in the jockey wheels, the more friction there is. But the higher the quality of the chain, the less friction it has. A Dura-Ace chain has much less friction than a 105 chain. Therefore, enlarging the jockey wheels is less effective there. If you climb a mountain on the small chainring with maximum power, the effect is particularly small. The advantage is greatest on an Ironman bike course because the power is slightly lower and the chain speed is higher on the big blade.

[satchmojack]

Hi there! I have a commuter bike outfitted with a Sturmey Archer 3-speed internal hub. I love the simplicity of it and the lack of any maintenance needed. Why do you suppose we don't see these more regularly with road bikes, at least before electronic shifting became all the rage? I've seen them go up to 8-speed versions at least from Sturmey Archer, and I believe Shimano has a line of these as well. They are heavy but I'm sure it could be engineered to be lighter and more comparable to other more common groupsets.