Conti GP 5000 35C: a new standard for road frames?

[cateto]

As you understood by now, I am not as concered about it as you. But I do understand your point of view. And I like big rims and I cannot lie.

Therefore, the best solution would be (and probably will be) rims like the Duke WRX AERO 42. On the 28 internal, a 40mm (like the Michelin Pro 5) tire will probably blow up to a 43 or so, making is perfectly in line with the rim and being within ETRTO standards. Everyone happy! It will just take some time for the bike industry to adjust.

This woud be absolutely amazing with a 38c tire like the Vittoria Corsa Pro. The WAM would be around 40mm probably, making it perfectly in line with the 105% rule 

make these rims in a 60mm depth and you will have a perfect setup for literally everything (except climbing lol)

In general, i would like to see more of this kind of design, with a big difference between the internal and external rim widths

[Takiyaki]

Jesse Coyle from Nero show recently tested new Tavelo bike with Pirelli 40mms and absolutely loved it

Super comfy, basically no speed loss.... hes saying this could be his only bike and hed even ditch his Incolor for it

https://youtu.be/kt0wt9LrvKg?si=7M6GgLjwWpcjXfaJ

40 is a little crazy for me and I have some smooth loops I will keep 28s for, but my next build will def focus on fitting 35s prob at 37 WAM for longer rides on crap roads.

[cateto]

Jesse Coyle from Nero show recently tested new Tavelo bike with Pirelli 40mms and absolutely loved it

Super comfy, basically no speed loss.... hes saying this could be his only bike and hed even ditch his Incolor for it

https://youtu.be/kt0wt9LrvKg?si=7M6GgLjwWpcjXfaJ

40 is a little crazy for me and I have some smooth loops I will keep 28s for, but my next build will def focus on fitting 35s prob at 37 WAM for longer rides on crap roads.

To be honest I was a bit surprised by his numbers. We should keep in mind that he did not really do any real scientific testing, he was comparing speeds recorded across many months, with different frames, different weather, different clothes, etc. (basically everything was different lol). Anyway really interesting.

To me the most important take is that on tarmac, gravel bikes are just better than road bikes for 99% of people, and that endrance bikes are basically pointless. Many of us have been saying this for a while and it's nice to see other influential people realizing it as well. Even the bit about the geometry was spot on, I really think that the geometry of modern "race" gravel bikes is just the best geometry for road bikes. (btw I also think that the geometry of modern grave bikes is bad for what they are supposed to do, but I guess this is a topic for another thread )

[Evaso_CC]

The Nero show tests were done on a pan flat crit circuit, no significant hills. If you were riding with a lot of climbing, I expect the weight of a 40mm tyre would be very noticeable.

[Pistonbroke]

Nero show was good, and echoed my current thoughts.
Still loving the 35 gp5k's - 38wam. If they come out with 40's I'll give them a go.
I don't do alpine ascents, but they are generally giving me the same or faster average on my rides, and using a gravel frame instead of previous road bike.
And it's very very comfortable!

[Takiyaki]

To be honest I was a bit surprised by his numbers. We should keep in mind that he did not really do any real scientific testing, he was comparing speeds recorded across many months, with different frames, different weather, different clothes, etc. (basically everything was different lol). Anyway really interesting.

To me the most important take is that on tarmac, gravel bikes are just better than road bikes for 99% of people, and that endrance bikes are basically pointless. Many of us have been saying this for a while and it's nice to see other influential people realizing it as well. Even the bit about the geometry was spot on, I really think that the geometry of modern "race" gravel bikes is just the best geometry for road bikes. (btw I also think that the geometry of modern grave bikes is bad for what they are supposed to do, but I guess this is a topic for another thread )

Gravel bikes just dont have the geometry I want. I like TT-ish geometry (steeper STAs, racy trail and more reach). Gravel bikes are starting to get more racy with geometry but road bikes like the LTK-266-D SL and Voice Velo Echo are much closer to ticking all my boxes. For folks who can handle + enjoy more aggressive geometry gravel won't do. We need race bikes w/big tire clearance and built in compliance.

[Pistonbroke]

Gravel bikes just dont have the geometry I want. I like TT-ish geometry (steeper STAs, racy trail and more reach). Gravel bikes are starting to get more racy with geometry but road bikes like the LTK-266-D SL and Voice Velo Echo are much closer to ticking all my boxes. For folks who can handle + enjoy more aggressive geometry gravel won't do. We need race bikes w/big tire clearance and built in compliance.

Bottom bracket drop 94
Stack 575
Reach 440
Seat angle 76
Head angle 72
Wheelbase 1050
Fork trail 45
Chainstays 425
Granted, chainstays are a bit long and maybe head angle not steep enough but it's nearly there :-)

[hugo]

The Nero show tests were done on a pan flat crit circuit, no significant hills. If you were riding with a lot of climbing, I expect the weight of a 40mm tyre would be very noticeable.

I love wider tires they're more comfortable and provides way more confidence cornering agressively. They usually feel slower but from my experience this mostly an imporession, the difference in speed is often negligable as long as you pick the correct tire pressure and you pick good tires. As an example, I recently switched my road wheelset (Continental GP5000 S TR 32mm) with my gravel wheelset (Schwalbe G-one RS pro 50mm) on my bike, while they felt way more sluggish when I'm looking at my time on section of flat smooth roads the difference is marginal. My gravel wheelset is slightly deeper 60mm vs 50mm so that might play a role, and the aerodynamic gains of the deeper wheelset might compensate for the slight rolling resistance penalty.

I don't think weight makes such a difference either. Between the 28mm and 40mm version of the Pirellu tire there is only 130g of differece, so with two tires it's around 260g, so around half a 500ml water bottle. You're own weight probably varies more than that during a long ride.

[Takiyaki]

Bottom bracket drop 94
Stack 575
Reach 440
Seat angle 76
Head angle 72
Wheelbase 1050
Fork trail 45
Chainstays 425
Granted, chainstays are a bit long and maybe head angle not steep enough but it's nearly there :-)

What frame is this?

[gribs]

It's either a Mondince FM316 or one of the other open mould variants. I've got the FM326 (same frame with a 25mm longer fork) and whilst it works well for me as a gravel bike it's only tolerable with road tires fitted, to the point where I'd rather just stick with my gravel wheels (50mm Conti Terrra Trail vs GP5000 32mm) if using it on the road.

[Pistonbroke]

What frame is this?

Yup, Gribs is right. fm316 but with road forks, which I guess make a bit of difference :-)
Anyhoo, sorry for straying off topic.
Fat tyres are good 

[Sahalee]

Nero show was good, and echoed my current thoughts.
Still loving the 35 gp5k's - 38wam. If they come out with 40's I'll give them a go.
I don't do alpine ascents, but they are generally giving me the same or faster average on my rides, and using a gravel frame instead of previous road bike.
And it's very very comfortable!

What rims (internal width) do you have these tires mounted on? They look good!

[Pistonbroke]

What rims (internal width) do you have these tires mounted on? They look good!

XMCS 26mm internal

[POTOOOOOOOO]

Okay, so I've been tinkering.

The 35mm GP5Ks have only just arrived so I don't know how they ride yet.
Observations - They are very easy to fit on a 25mm internal and feel much more secure on a 32mm internal.
To the point that regardless or ETRTO I wouldt ride them on the two 25mm internal wheel sets I have.

To date my fauoured set up is the 32mm GP5K clincher on the 32mm internal. It feel wonderful and is very secure even at 0 psi.
Hopefully the 35mm GP5Ks are even more impressive.


The GP5K 35mm were 370g each and a 32mm clincher is 290g.

Obviously the 35mm will grow as they're used - but how much ?

NOTE - all rims are hooked

[jfcb]

That's very interesting. This is what makes we wonder when people state tyre width X is faster/slower/more comfortable/... than tyre width Y.
There is so much variability in WAM for a certain tyre that people might be talking the same but mean something differently and vice versa.

Did you also measured tyre height?