Tires for S40

[dule0911]

@velocio
Thanks for the links. Knew about the site, but forgot to check it. By looking at Daves photos and description, a 5000 700x32 should barely fit - it's 1mm taller then the 4000 700x28. Not sure if 0.5-1mm of clearance would be enough though - since he mentioned that a 1.5mm alen can fit between the tire and fork, I'm guessing that the distance to the fork is 2mm max with the 4000 700x28.

I'm also considering the Vittoria Corsa Control G2.0 Folding 30-622. Didn't find the 30 width in some review, but they should fit if the 25 review is anything to go by, since they are about a mm lower then the comparable conti GP4000S II 25C.

 

[benphyr]

Wow. At that range it seems as though tire inflation pressure would impact the tire dimensions! Would you be hitting one of those big potholes and having the flex of the wheel/tire be significant enough to rub/catch/grab?

 

[Postapocalypsia]

My new S40 must have been the last of the 2019 frameset stock - I am running Schwalbe G-one allround 700x38 tyres with great success.

 

[dule0911]

You got lucky then With the 2020 model, if you want a softer ride the recommended way is to go 650b. But for touring the 700c/622mm is a much more better solution with loads more options - a more common tire size. In case of some defect it's a lot easier to get a replacement in the middle of nowhere. Not sure if this was the right way to go (maybe the fork could have been a bit longer), but it is what it is, my want for an S40 was bigger then the (now) limited tire options.

@benphyr
I guess I'll find that out in some real world testing, ordered the Vittoria Corsa Control G2.0 30-622. If it doesn't work/rubs I'll switch to some 28mm Continentals.

 

[benphyr]

@dule0911,

Maybe you could find someone who wants to swap:
your brand new S40 with better fork attributes (if applicable) - and wants standard size tires or smaller wheels anyway
with
their used S40 with the older fork with more clearance for your preference touring tires.
(though your location might make this challenging unless you convince a friend to buy a one too!)

 

[dule0911]

I'll ride it first with the 30mm tire, then I'll know if it suits me or not and think about solutions if it doesn't. The bike is still in the box

 

[super slim]

@dule0911,

Maybe you could find someone who wants to swap:
your brand new S40 with better fork attributes (if applicable) - and wants standard size tires or smaller wheels anyway
with
their used S40 with the older fork with more clearance for your preference touring tires.
(though your location might make this challenging unless you convince a friend to buy a one too!)

GREAT Idea!!!

 

[I_S_MS]

My new S40 must have been the last of the 2019 frameset stock - I am running Schwalbe G-one allround 700x38 tyres with great success.

So U `re lucky. I heath new fork and about 1,5 mm Spae with the Kendals tires. This lead to significant Noise and drag on byway home in the rain. (I already asked if anything was wrong with my fork since I saw no Space for fenders in the f-fork and was told to look for race blades.
This limits the usability for commute (56 km / 1 Way) and audax/brevet-use. I should have ordered earlier.
I will not add a dynamo hub for addax/ brevet use to a bike with drag in the rain.....

 

[velocio]

So U `re lucky. I heath new fork and about 1,5 mm Spae with the Kendals tires. This lead to significant Noise and drag on byway home in the rain. (I already asked if anything was wrong with my fork since I saw no Space for fenders in the f-fork and was told to look for race blades.
This limits the usability for commute (56 km / 1 Way) and audax/brevet-use. I should have ordered earlier.
I will not add a dynamo hub for addax/ brevet use to a bike with drag in the rain.....

The gen 3 fork would be a bitter pill for me as well. My fork is the original, gen 1, which isn't as accommodating of fenders as the gen 2, but it can be fendered with a bit of ingenuity. Does CB HQ have gen 2 forks available for purchase and do they work with the current S40 frame? If so, that may be a way to get more tire/fender clearance. Alternatively, would a move to 650B make sense? There are very fast, efficient, comfortable 650B tires available these days and 40mm tires + fenders can be fitted.

-Jack K.

 

[Pollock]

My fork is the original, gen 1, which isn't as accommodating of fenders as the gen 2, but it can be fendered with a bit of ingenuity.

-Jack K.

slight derailment. @velocio if you are still looking for fenders, check out the recent blog post from Robert H. They should fit gen1 S40 as well. https://cruzbike.com/blogs/blog/fitting-fenders-cruzbike-s40-2020

In that post, Robert also briefly mentions wider 650b tires on the 2020 S40.

 

[dule0911]

The gen 3 fork would be a bitter pill for me as well. My fork is the original, gen 1, which isn't as accommodating of fenders as the gen 2, but it can be fendered with a bit of ingenuity. Does CB HQ have gen 2 forks available for purchase and do they work with the current S40 frame? If so, that may be a way to get more tire/fender clearance. Alternatively, would a move to 650B make sense? There are very fast, efficient, comfortable 650B tires available these days and 40mm tires + fenders can be fitted.

-Jack K.

This is a good question. If anybody from cruzbike can give an answer to this, it would be helpfull. I would even buy one and leave it on the side, swap it when I want to go on longer tours.

650b is ok, I just don't find any spare options for narrower tires (non MTB) around my area. Everything for 650b has to be ordered/custom built. This is fine for daily drives near the home, but on tours? It's nearing stupidity, because if some spare tire is needed, the simple answer is - there will be none. I would prefer to go 26' or 559mm in that case, but then again what's the point of the S40? I have the Q45 which already has 26' tires. Also, with the whole cx/gravel thing becoming more popular, there are plenty of options in 622 form, narrow and wide.

 

[benphyr]

...I would even buy one and leave it on the side, swap it when I want to go on longer tours....

Now that could be pretty awesome!

what's the point of the S40?

To me, the prerequisites are knowing that:
-Recumbent is ALWAYS more comfortable no matter what style or purpose all other things being equal.
-Diamond frame is always more agile considering same style and purpose all other things being equal.
-Therefore loose, slippery, very bumpy (tree roots), surfaces and things such as curb jumping are more in the realm of the diamond frame.

So recognizing the nature of the bicycle having two wheels (with someone balancing themself on top of it) aims it at smooth, hard, grippy level surfaces. Likewise loose surfaces, jumps, bumps, etc. require concessions or specially designed components (suspension, geometry, wide tires) to help overcome those additional challenges. Therefore, the range of the machine we are looking at is aimed at pavement - preferably smooth.

Again reminder that the recumbent ALWAYS wins the comfort points and any endurance ones that go along too.

With those in mind,
V20- absolute TT / race dedicated machine T50- inexpensive starter or tinkerer’s delight
Q45- commuter, rough roads, packable for flight, adventure touring (needing universally available parts). And as good as it gets for all the edge cases.

The S40 is a performance road bike with the braze-ons that make it suitable for loaded road touring or fenders for a speedy commuter. Which puts us in the dilemma of all great German engineers: everything is a compromise and for an individual use case it is unlikely that all variables will = best.

And a last thought: not that many years ago few besides @superslim would have thought to put 700-30 tires on a road bike. So an improvement in handling that still allows 700-30 tires is a wow for most but a minor bummer for those of us wanting a wider than 30 tire in the 700 size.

Would using 559 wheels with wider tires work as an alternative when touring?

@superslim what pressures does your chart say that @dule911 should consider ideally for the 700-30 stock tires and 110 kg of bike, rider, and water not counting touring stuff?

 

[super slim]

Now that could be pretty awesome!

To me, the prerequisites are knowing that:
-Recumbent is ALWAYS more comfortable no matter what style or purpose all other things being equal.
-Diamond frame is always more agile considering same style and purpose all other things being equal.
-Therefore loose, slippery, very bumpy (tree roots), surfaces and things such as curb jumping are more in the realm of the diamond frame.

So recognizing the nature of the bicycle having two wheels (with someone balancing themself on top of it) aims it at smooth, hard, grippy level surfaces. Likewise loose surfaces, jumps, bumps, etc. require concessions or specially designed components (suspension, geometry, wide tires) to help overcome those additional challenges. Therefore, the range of the machine we are looking at is aimed at pavement - preferably smooth.

Again reminder that the recumbent ALWAYS wins the comfort points and any endurance ones that go along too.

With those in mind,
V20- absolute TT / race dedicated machine T50- inexpensive starter or tinkerer’s delight
Q45- commuter, rough roads, packable for flight, adventure touring (needing universally available parts). And as good as it gets for all the edge cases.

The S40 is a performance road bike with the braze-ons that make it suitable for loaded road touring or fenders for a speedy commuter. Which puts us in the dilemma of all great German engineers: everything is a compromise and for an individual use case it is unlikely that all variables will = best.

And a last thought: not that many years ago few besides @superslim would have thought to put 700-30 tires on a road bike. So an improvement in handling that still allows 700-30 tires is a wow for most but a minor bummer for those of us wanting a wider than 30 tire in the 700 size.

Would using 559 wheels with wider tires work as an alternative when touring?

@superslim what pressures does your chart say that @dule911 should consider ideally for the 700-30 stock tires and 110 kg of bike, rider, and water not counting touring stuff?

(700c) 622*30 tyres = 77 psi, with 65 psi min for a Schwalbe PRO One (6.0 Speed, 4.5 Puncture, 4 Durability)
http://www.schwalbetires.com/bike_tires/racing_tires

(650B) 584*40 tyres = 46 psi, with 45 psi min for a Schwalbe G One speed TLE (6.0 speed, 5.5 Puncture, 2 Durability)
https://www.schwalbetires.com/bike_tires/G-ONE_Speed
(26") 559*42 tyres = 42 psi, with 50 psi min for a Schwalbe Marathon Supreme (5.0 Speed, 5 Puncture, 4 Durability)
https://www.schwalbetires.com//bike_tires/road_tires/marathon_supreme

 

[dule0911]

@benphyr
You missunderstood the "what's the point" part. I meant in comparison to the Q45 which I already have. It's on 26', which I'm not planning to change - it's super comfortable and reasonably quick. But if I put the same wheel size on the S40, I would feel like I didn't gain much. The bike would be faster for sure, no question about that, just in my mind there would be something missing - since I bought it to be faster with bigger/lighter wheels, but still with the option to tour.
I wouldn't buy it if I didn't think it's great, just trying to think ahead and prepare/adapt if possible

The other option is to find a really tough (puncture wise) tire that is narrow and fits in the 2020 fork. If something like that exists and is comfortable enough (for me) with a light load, I could try that. But from what I looked it's mostly performance oriented tires with some basic puncture protection. Maybe the Corsa Control will even work ok for this, who knows.

@super slim
Thanks for the info, I was planing to run my tires somewhere around 5.5bar, so that adds up.

 

[I_S_MS]

The gen 3 fork would be a bitter pill for me as well. ....
Alternatively, would a move to 650B make sense? ...

I already stock tires in 405 and 559 for my recumbents and 622 for the Velomobil, and I have no ambitions to add a new size....
- still not happy with the choice - a week with warm ridable but wet weather ahead, perfect for training in the rain while commuting; will probably take the Velomobile... ;

 

[paco1961]

Getting excellent puncture resistance AND excellent road performance in a tire is like trying to buy a bike that is super fast and super cheap. To me the best option for getting excellent puncture resistance with excellent performance is to pick a great performance tire and add a tire liner. They come in a wide variety of widths and there is even a “light” version if that’s your thing. Have many, many puncture free miles behind me thanks to Mr Tuffy.

Of course you could also go tubeless for added puncture resistance.