Nextie 40mm wide gravelrim! NXT45AGX

[sunfire2k5]

Nice! Only the wheelssets themselves available yet, not the completely build wheels. Will come though probably.

But not sure if going even wider than their 29mm is good. The weight drop of the rims is interesting.

32mm is OK (ref Zipp 303 SW) when running 40-55mm tires.

I will try to order and relace my AGXs with new SGV!

I'm going to be a bit conservative and wait for more people to try these ultra wide rims. Still a bit too many user reports of side wall flats on these type of rims due to the more exposed sidewalls. (Zipp 303 SW).

But happy to see others try it first, please let us know your thoughts once you've used them

I have the agx today and they are really good. 2mm more internal and save 60-80grams is worth upgrade to new SGV..

I dont have lots of rocks and etc here in Norway. Flat smooth gravel.

[Requiem84]

What tires do you run on the AGX?

[sunfire2k5]

What tires do you run on the AGX?

Terra Speed 40mm has been my go to tire because its fast and handles very well on the gravel I have here. I ran 45mm on my GRIFN RS for a little while also and will probably run 45mm Terras on the ASTR RS.

AGX with 45mm Terra is like 46.8mm ish. Hopefully the new rims will offset the extra weight with 45 vs 40mm tires

[Requiem84]

Makes you wonder when we will see the step from 40mm EW to 45mm EW (or even 50mm).

[sunfire2k5]

yes - 45mm EW and 35mm internal f.ex.

[andrewbn42]

Does the tread generally flatten out so it measures wider? I definitely worry about the sidewall exposure


Sent from my iPhone using Tapatalk

Yes, each extra 1mm of internal rim width stretches the casing wider, and adds 0.3mm to 0.4mm to the external tyre width. The radius of the tyre becomes larger/flatter.

The upside is more air volume for the same tyre weight. The perceived upside is compliance to the rule of 105% though some are now refuting its importance or existence.

The downside is sidewall exposure. If you suffer from sidewall punctures in your area, discard the rule of 105 and increase the tyre width to protect the sidewall more.

Yes stretches the casing wider, but I was specifically curious if anyone has checked tread width. BRR measured the gp5000 tr to have a tread of 30mm wide, and the 5000 AS tr with a tread of 32. He just measures on real skinny rims. On these rims does that change at all or is it just casing? It seems to me that it should, but I’d like to know from someone who has these wheels.


Sent from my iPhone using Tapatalk

[emotive]

I expect BRR measures the tread width with the tyre laid flat on a table. The wider rim does not stretch the tread. The wider rim and resulting larger tyre curvature does affect what part of the tyre you ar riding on, so you will end up outside the tread sooner.

Tread width and sidewall exposure is something to consider again with the 32i on the new version. After the 303XPLR punctures and cracked rims, I wont be running anything smaller than about 48mm WAM for offroad use.

[andrewbn42]

According to the table on BRR, they take the measurements of the tires while mounted at low air pressure. I assume that that is the low air pressure threshold from the testing they do. I was curious if the tread on something like a gp5000 Tr or As gets wider, as he measures them at 30 and 32 mm in their largest sizes.
I’ve got a set of the WG44 on the way, and I’m contemplating what tires to go on it. Currently thinking gp5000 as 35 or pro one 38, as my bike will clear both.


Sent from my iPhone using Tapatalk

[emotive]

If a tyre casing has a total width of 90mm, including 32mm of tread in the middle, the casing doesnt actually stretch much, maybe only a couple of mm. The stretch is is determined by the air pressure, not the rim size. Higher pressure = more stretch.

A wider rim will just spread the tyre wider on the rim, not stretch the tyre more.

[andrewbn42]

If a tyre casing has a total width of 90mm, including 32mm of tread in the middle, the casing doesnt actually stretch much, maybe only a couple of mm. The stretch is is determined by the air pressure, not the rim size. Higher pressure = more stretch.

A wider rim will just spread the tyre wider on the rim, not stretch the tyre more.

But if the tread is mounted on a narrow rim and measured, does it get appreciably wider when on a much wider rim as it flattens out a little bit?


Sent from my iPhone using Tapatalk

[hannawald]

Now there is a promotion from Nextie with free global shipping. I was thinking about Nextie Supreme SGV Super wide (32mm int) 45mm 400g rims. I just don´t get the approach of these chinese manufacturers. I asked them whether I should look for carbon spokes or CX Rays - I am afraid of too much stiffness of carbon spokes for gravel. They replied that carbon spokes are reliable and they have a new type of carbon spokes which is also good for all mountain. I asked them again whether 24 carbon spokes won´t be too stiff when others designing wheels with 20 carbon spokes rather than 24.
They replied to me: "Yes, at first, almost the carbon spokes are built with 20holes hubs or even 18hole hubs. Because the current trend is 24-hole disc brake road hubs. Basically, customers also choose 24-hole road disc brake hubs. And the strength and performance of 24-hole wheels are better than 20-hole wheels."

It just seems to me that they mount carbon spokes because it is trendy without considering what setup is the best for the rim/intended usage/rider weight and power etc. The same hub and rim and spoke setup can´t be the best for carbon/steel spokes...
Wonder what you think might be the best.I like the rims as they seem both light and semi aero with huge weight limit and with these dimensions they will look good so you have it all in one package.

I also asked them if their Rollingstar hubs are compatible with DT Swiss ratchets (just in case there will be any problems in the future I can quickly source a replacement). They told me that in theory yes but "the ratchet precision of the Rollingstar II Road hubs is not the same as that of DT Swiss. That's the reason we don't recommend using DT Swiss ratchet. We cannot promise that there will be no problems in the future."
What do they mean by precision? I doubt their ratchets have better tolerances than DT Swiss...

[Uberflo]

I would go for CX Rays and DT Swiss hub. The Nextie spokes have not the best reviews on Chinertown.

[hannawald]

I would go for CX Rays and DT Swiss hub. The Nextie spokes have not the best reviews on Chinertown.

Thanks. Is there something wrong with their Rollingstars (240 level weight but cheaper)? Nextie says they sold over 300 pair without a single warranty issue.

[Uberflo]

No experience but if you read other threads on china hubs they start to rust fast (e. g. Elite Wheels). I always stick to DT240.

[Aradell]

I would go for CX Rays and DT Swiss hub. The Nextie spokes have not the best reviews on Chinertown.

Thanks. Is there something wrong with their Rollingstars (240 level weight but cheaper)? Nextie says they sold over 300 pair without a single warranty issue.

I have the Rollingstar hub on my NXT45AGX. I've done 4500km on the wheels so far, a mix of commuting on road, gravel riding, and about 250km of riding on the beach. I took apart the hubs one time so far. Everything was fine inside; I just cleaned them and reassembled.