Current Projects chat and miscellany

Looks like a posher arkose

Ah which picture?

Ah which picture?

My mistake, thought you were replying to frankenbike's Soma suggestion.

Last time I checked he was still going strong.

@PhilDAS youre welcome to borrow my 650b 42mm wheelset to see how they fair on your Arkose if you like. Like I said they improved the ride of my CX/gravel bike (orlo) drastically

Did someone mention wanting a totally pointless but utterly fantastic in every way carbon gravel bike??
HMU.

So the weight of the wheels being roughly the same is perhaps a myth?

Not in my experience.

Making the jump to tubeless at the same time helps as big 27.5 tubes aren’t light. And you could go weight weenie to a greater degree on a smaller/stronger wheel. But overall it’s ~ 100g a wheel or thereabouts. Nothing you’re going to notice.

EDIT: Regarding rolling resistance - how come a wider tire run with lower pressure has same rolling resistance then a 28mm tire with higher pressure?

https://web.archive.org/web/20130521064146/http://www.bikeradar.com:80/gear/article/bicycle-tires-puncturing-the-myths-29245/

Not the 3t Shirley

Edit: doesn’t matter, just checked the price of a new 3t frameset. Not a chance I can afford it anyway

If a 25 mm tire has 5% less rolling resistance over 23mm tire then a 47 mm tire must have like 45-50% less rolling resistance over a 28 mm tire!

Good read but kinda irrelevant.

Yes, lower trail is probably what makes the 700c to 650b conversions feel more lively.

Was also a good point about going tubeless, probably some precious grams saved there!

Let’s move on.

Most people look for an excuse to own more bikes. Not less. Phil are you feeling ill?

#uokhun

If a 25 mm tire has 5% less rolling resistance over 23mm tire then a 47 mm tire must have like 45-50% less rolling resistance over a 28 mm tire!

Yes. On terrain that requires an equal percentage of suspension-to-volume as the 23mm tyre (I think).

Further reading.
https://www.schwalbe.com/en-GB/rollwiderstand.html

If a 25 mm tire has 5% less rolling resistance over 23mm tire then a 47 mm tire must have like 45-50% less rolling resistance over a 28 mm tire!

Reverse #ubinscobled

I’m adding a mountain bike, looking for a bike to replace one I already own so really I’ll be 1 up, not down :)

I’m adding a mountain bike

Don't do it.

@Pawlus @miro_o That Schwalbe link is pretty good, basically rolling resistance keeps going down with wider tyres (at the same pressure!!) until you get to a perfectly round contact patch since the circumference 0f the contact patch is where rolling resistance is created and circle has the lowest circumference for it's area (and the area stays the same at the same pressure):

Looks about that, would look super clean with a flat transition, bit like some of the Look bikes.

Still want to put some 650s on my Equilibrium after seeing yours. Did you sell the wheels or just the frameset?

Still got the frameset and the wheels are on my partner's bike.

Previous gen Fugio with different forks/braze ons added/guard adapters?

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basically rolling resistance keeps going down with wider tyres (at the same pressure!!)

But you cannot keep the same pressure for larger tires as the casing tension is higher. There is a thing as too high pressure, and it is not the same for small and large tires.

There is a sweet spot for rolling resistance. For good roads the advantage of larger tires ebbs out at about 30mm.

more here:
https://silca.cc/blogs/journal/part-4b-rolling-resistance-and-impedance

There is a sweet spot for rolling resistance. For good roads the advantage of larger tires ebbs out at about 30mm.

Like I said, rolling resistance keeps going down until the contact area is a circle. For different pressures and system weights (rider + bike + luggage) there will be a different tyre width where the contact area is a circle. For a certain system weight at road pressures that could be 30mm, but that won't be the case for everyone.

Ah, I thought you sold it. What size tyres did you manage to clear with guards?

Diggin that build

G-One Speeds kinda fit in 38mm

Love that, any idea on tyre size? Look like 32's on there.