Transcontinental Race No. 7 - TCR7 - #TCRN07 - 2019

dotwatcher.cc

https://dotwatcher.cc/race/transcontinental-race-2019

Couple of those big Estrella bottles while packing = sweet dreams.

During the race = actual teeth crumbling. Well, I've had some dental work since RATN so I hope not.

Do you fly today?

At work today. Fly tomorrow morning. Most stuff is packed.
Couple of things I wanna maybe add like some food stuff.

Tracking details not announced yet but Freeroute won't be working, as Ivan is racing.
I assume it will be on Trackleaders, most likely on this page.
http://trackleaders.com/transconrace19

I prefer dotwatcher these days as it has the map as well as some reporting, rider pics, etc.
https://dotwatcher.cc/race/transcontinen­tal-race-2019

Yes, I see - it has trackleaders embedded in it.

oooh cool, can you share what is the inner width of the rim and the air pressure.
Interested to know what factors make the 35mm come up as a 33.

How do you find the weight? It's alright to swing around no?

another tech talk,

Happy to post the following on different appropriate thread if someone shares which one.
Since the time we were on about rear mechs & cassettes etc., I wanted to figure out the maths of why does a 46/34 front works with an 11/40 rear and also compare with the new GRX.

We know that the Ultegra RD-R8000-GS & RD-RX-800-GS, that is meant for a 34 tooth max rear cassette can handle a 40 with the B screw adjustment. Presumably due to a larger body size than previous generations.
But why does Wolftooth say that with a 46/30 front with an 11/42, it requires an XT rear mech? = mech capacity.

Medium cage:
Ultegra RD-R8000-GS = 39 Teeth
Ultegra RD-RX-800-GS = 39T
GRX RD-RX812 = 31T

Medium cage? Or is it longer?
GRX RD-RX810 = 40T

Long Cage :
XT RD-M80000-SGS = 47T

If we look again at the 46/34 front with an 11/40 and do the maths: (46-34) + (40-11) = 41
To go 2 teeth over the capacity of 39 is something like a chain link difference so I can see how the medium cage Ultegra can handle this. With only a 12T difference at the front this makes sense of why this setup works well.

Interestingly the new GRX capacity are not what I expected. They are meant as an either/or option of a 1x, or 2x with their new crank and a max 34T at the rear.

If we look at a 46/30 front with an 11/42 then (46-30) + (42-11) = 47
Et voila long cage XT mech to take up the chain slack from 16T at the front and 31 at the rear.

The GRX RD-RX810 has a rated capacity of 40T. Presumably one more T to take up the slack from the 17T difference in their 48/31 crank offering.

What if we wanted to run that new crank with an 11/40 rear? (48-31) + (40-11) = 46
That is XT territory. Will the GRX RD-RX810 work? Can a 40T capacity be stretched to 46? Or 48 if we wanted to run an 11/42 at the rear?

It depends on the length of that cage on the RX810. Maybe it is longer and more like the long cage XT than the mediums?

After some googling I have not found anything. It would be good to know before spending the time and money on another experiment.

I'm not exactly sure what you are asking.
However max tooth capacity is dependent on distance below the largest cog.
The wrap capacity is more how the derailleur functions.

Whether or not it works depends on bike geo too.

Bloody maths causing us problems!

Will the GRX RD-RX810 work with a large cassettes at the rear and a large tooth difference at the front.

Based on the data and experience we know from ultegra, and doing the maths, that answer is no. But lets leave the "maybe" door open for now.

Looks like Shimano want you to do one or the other. Large range at the rear, or at the front, and then buy into the components that get you that. Those of us that want/need both, still have to deal with wolf dohickeys.

Think we'll be allowed in the Buzludzha Monument? Looks amazing

GRX RD-RX810
Wrap capacity is 42T

https://www.buzludzha-monument.com/visit

"For many years visitors continued to gain access inside the Buzludzha Monument through broken doors and windows, even after entry was officially prohibited. Now however, these entry points have been sealed and a guard watches over the site 24/7. (For a discussion of why this is a good thing, please see this news post.)"

http://www.buzludzha-monument.com/news/2018/5/20/security-guard-posted-at-buzludzha

Yeah had read the reports, I did wonder if they might have tried to arrange something

Bulgarian moneygun the security guard

Rims are Dt r460 and mavic open pro ust disc, so width is about 19mm. 3 bars.
They don't feel heavy, much closer to a gp4000 than voyager hyper.

I kind of want a set now...

Finally decided what lights to use.

Had to go for a ride round the local park as not ridden in the dark for ages.

Confirmed the misgivings I had about my exposure Strada, it just doesn't put enough light down the road. So I'll take an eBay usb job instead. With a Fresnel lens fitted to focus the light a bit and stop dazzling it's a really good light and it runs directly off a power bank.
Backup will be a b+m ixon iq premium, which gives 20 hours of decent light off 4 AAs. Will probably take rechargeables and use disposables only if power running low.

How’s the thunder storm? @hippy

Dunno. Getting smashed in a bar

Looks like it should stop raining just as we land

Is there a list of forumgers doing TCR7 and cap numbers?