Author Topic: ZTTO MTB M1 Boost hubs 28H 54T Ratchet  (Read 23561 times)

Aesch

Re: ZTTO MTB M1 Boost hubs 28H 54T Ratchet
« Reply #90 on: June 04, 2021, 09:11:02 AM »
Received another M2 hub today, I'll post my measurements later. Asked for 36T/11s which they put, but did not add any grease.
There is a large amount of bearing friction on the cassette hub portion (bearings pressed together too hard?). This is not an issue for normal riding, only freewheeling you'll have extra resistance. On my first hub if you spin the wheel on the stand, the cranks will sometimes spin forward a bit. So I'm thinking this is the cause there.

Yes they are just pull off, held on with oring friction. Mine are not tight at all.
Where did you source the 12mm caps? I was just going to use a cylindrical 15mm adapter like this: https://www.aliexpress.com/item/1005002107520669.html (36g)
This style looks similar: https://www.aliexpress.com/item/32917372157.html

But now that I look at the included 9mm QR caps, could be possible to drill those out for 12mm as well.

edit:
M2 Rear 142mm x 12mm 11s road
- Flange to flange = 53.9mm (LtoC = 36.25, RtoC = 17.65)
- PCD L = 46.5
- PCD R = 53.5
- Spoke offset = 0.6mm? (I need to remeasure with a spoke)

M2 front 100mm x 15mm
- Flange to flange = 58.9mm (LtoC = 23, RtoC = 36)
- PCD L/R = 45.4
- Spoke offset =

The PCD is tough to measure. These numbers are close to the ones I linked a few pages back on ali. Only one that might be far off is spoke offset, need to double check that.

https://spokecalc.io/measuring-a-straight-pull-hub.html
Thanks for sharing!
I must admit it is a bit confusing for me, when I put in these numbers in any calculator for a rim with 571 erd I get something in the region of 272mm spoke length. I asked ztto for their suggestions and they gave me 290 and 292mm as suggested spoke lengths.. Miles off so it seems.

I'll go and measure (or try to) myself too and see what gives.

How is the spin on your front hub? It's pretty draggy on mine, I'll see if loosening up the preload does anything otherwise I'll have to replace the bearings too I guess.

Aesch

Re: ZTTO MTB M1 Boost hubs 28H 54T Ratchet
« Reply #91 on: June 04, 2021, 10:08:42 AM »
So I followed instructions on the website and get almost identical measurements. Offset is difficult indeed! I get to 0.75mm

7mm across at nipple bed, then 1. 5mm head, 1.25 mm depth.
3.5 - 2. 75 = 0.75mm offset.

Would these be 2cross or 3 Cross?

cst_jpr

Re: ZTTO MTB M1 Boost hubs 28H 54T Ratchet
« Reply #92 on: June 04, 2021, 05:36:56 PM »
So I followed instructions on the website and get almost identical measurements. Offset is difficult indeed! I get to 0.75mm

7mm across at nipple bed, then 1. 5mm head, 1.25 mm depth.
3.5 - 2. 75 = 0.75mm offset.

Would these be 2cross or 3 Cross?

0.75mm seems right, I'll update my post. 3 cross only.

571 erd according to spokecalc or DT gives 288/289 for front hub. You must have entered something like incorrect number of holes, try it again.
290/292 they suggest is close enough it would likely work with a short nipple, squorx, or with washers. But 16mm could be a problem.

For the front hub friction, there is a threaded ring on the non-disc side that sets preload. First undo the m3 screw locking it in place, then turn it clockwise to loosen it. You may have to hold onto the axle, but be careful not to crush it and use the wide section that is the strongest. Turn it back counter-clockwise until its just lightly finger tight. There should be no side to side play.

Quite a bit of friction is expected since there are 5 rubber contact seals inside. So it may already be ok.
While you have it open, can put some grease to protect the bearings, mine was barely greased on just one side only.
« Last Edit: June 04, 2021, 10:57:17 PM by cst_jpr »

Aesch

Re: ZTTO MTB M1 Boost hubs 28H 54T Ratchet
« Reply #93 on: June 05, 2021, 09:40:47 AM »
0.75mm seems right, I'll update my post. 3 cross only.

571 erd according to spokecalc or DT gives 288/289 for front hub. You must have entered something like incorrect number of holes, try it again.
290/292 they suggest is close enough it would likely work with a short nipple, squorx, or with washers. But 16mm could be a problem.

For the front hub friction, there is a threaded ring on the non-disc side that sets preload. First undo the m3 screw locking it in place, then turn it clockwise to loosen it. You may have to hold onto the axle, but be careful not to crush it and use the wide section that is the strongest. Turn it back counter-clockwise until its just lightly finger tight. There should be no side to side play.

Quite a bit of friction is expected since there are 5 rubber contact seals inside. So it may already be ok.
While you have it open, can put some grease to protect the bearings, mine was barely greased on just one side only.

You're absolutely right! I must have made a mistake(at least a consistent one since I did try two calculators..)

I get to 288 and 289 for front and 289 with 288 for the rear.

Now waiting for the rim to make sure the erd is correct!

I intend to use sapim 14mm brass nipples, they have a continuous tread as apposed to dt so should be good. And should work well with the pillar 1420 I hope to order ASAP.

cst_jpr

Re: ZTTO MTB M1 Boost hubs 28H 54T Ratchet
« Reply #94 on: June 08, 2021, 03:23:19 PM »
DT 54T have the inner ring of the ratchet milled out.
ZTTO 36T and 54T have this as well.
Quality of the DT ring is obviously much higher, smoothed finish, nicer plating.

But now I see partly why the DT 18T ratchet kit is cheaper (~$40), they left this unmachined, so weight is slightly higher. 24g vs 19g for both ratchets.



wfl3

Re: ZTTO MTB M1 Boost hubs 28H 54T Ratchet
« Reply #95 on: June 09, 2021, 12:34:13 PM »

Most people swap out the 18Ts, but they are strong, really quiet and spin with a lot less drag.

cst_jpr

Re: ZTTO MTB M1 Boost hubs 28H 54T Ratchet
« Reply #96 on: July 03, 2021, 05:58:18 PM »
The second hub I got, I noticed they've changed the rear hub design after trying to swap the endcaps and it wouldn't fit. The freehub is the same though.
Not sure why it was done, ztto didn't explain. It brings the NDS bearing closer in to be below the spoke area. So more like a real DT350.

Adilka

Re: ZTTO MTB M1 Boost hubs 28H 54T Ratchet
« Reply #97 on: July 09, 2021, 06:27:54 AM »
Here's a detailed drawing of this hub.



Hi! Can anyone help me to caculate correct spoke lengh for M1 hub with this rims: https://www.lightbicycle.com/AM927-asymmetric-rim-profile-carbon-29-inch-carbon-rims-mtb.html

Rim ERD is 591mm (not including nipple head dimension).

Thanks!


Aesch

Re: ZTTO MTB M1 Boost hubs 28H 54T Ratchet
« Reply #98 on: July 19, 2021, 04:19:26 PM »
So I've built a new set of gravel wheels with these hubs  ;D

Im glad I redid the spoke measurements as I ended up with 288+290 in spoke length and these lengths are perfectly tensioned JUST before bottoming out. The advice to get 290+292 would have meant unfinished business. Total weight with pillar 1420 spokes, brass nipples from sapim and 26 internal/32external width gravel rim from farsports is 1479grams.

I look forward to riding them!


markchia

Re: ZTTO MTB M1 Boost hubs 28H 54T Ratchet
« Reply #99 on: August 01, 2021, 02:39:59 AM »
Bearings:

The Rear Hub Driver (Microspline) uses 2x - 6802-2RS bearings.
The Rear Hub uses 2x - 6902-2RS bearings.
The Front Hub uses 2x - 18307-2RS bearings  (for DT Swiss Bearings: HSBXXX00N2148S)

I built a wheelset using these hubs, they look great so far but replaced the bearings proactively (Japanese Bearings, EZO, or IJK).  I used DT Swiss Spoke Calculator (which was spot on for these as well when I chose DT 240S Straight Pull, 28H for the front hub) to calculate spoke lengths.

Coupled this hub with the DT Swiss EX511 Rims (29er, 28H), Sapim CX-Sprint Spokes, and DT Swiss Squorx Pro Brass Nipples (ProLock).   If I were to do it again, I'd go with the SAPIM Double Square Brass nipples instead.   The Squorx Pro Brass nipples I got are colored black, I'm assuming the coating DT Swiss used added some thickness to the nipples and it was a pain to get the DT Swiss Squorx Nipple Driver to mate with some of the nipples properly.

I've just ordered these hubs and I'm trying to calculate spoke lengths with the Dt spoke calculator. Is it safe to assume you used DT 240s straight pull CL for the rear as well?

Aesch

Re: ZTTO MTB M1 Boost hubs 28H 54T Ratchet
« Reply #100 on: August 02, 2021, 03:02:05 PM »
0.75mm seems right, I'll update my post. 3 cross only.

571 erd according to spokecalc or DT gives 288/289 for front hub. You must have entered something like incorrect number of holes, try it again.
290/292 they suggest is close enough it would likely work with a short nipple, squorx, or with washers. But 16mm could be a problem.

For the front hub friction, there is a threaded ring on the non-disc side that sets preload. First undo the m3 screw locking it in place, then turn it clockwise to loosen it. You may have to hold onto the axle, but be careful not to crush it and use the wide section that is the strongest. Turn it back counter-clockwise until its just lightly finger tight. There should be no side to side play.

Quite a bit of friction is expected since there are 5 rubber contact seals inside. So it may already be ok.
While you have it open, can put some grease to protect the bearings, mine was barely greased on just one side only.

As an update to the friction part: everything runs smoothly after a few rides so it was just the bearing seals that needed some settling.

Matt_C

Re: ZTTO MTB M1 Boost hubs 28H 54T Ratchet
« Reply #101 on: October 10, 2021, 12:26:01 PM »
Reviving this thread. I have a friend looking to run this hub with a campagnolo freehub. I can't find this hub stock with the campag freehub but dtswiss make a campagnolo freehub for the DTswiss ratchet hubs. Does anyone have any idea if a genuine dtswiss 350 campagnolo freehub body would fit This hub? See pics attached of dtswiss campag freehub.

Ernie_Loquasto

Re: ZTTO MTB M1 Boost hubs 28H 54T Ratchet
« Reply #102 on: October 10, 2021, 04:53:59 PM »
Sí encaja perfectamente.

T715

Re: ZTTO MTB M1 Boost hubs 28H 54T Ratchet
« Reply #103 on: December 28, 2021, 09:11:45 AM »
From Ztto page....

Spoke length for reference

M1 with ERD 596 Front brake side:300 other side:302 Rear brake side:302 driver side:300
M1 with ERD 562 Front brake side: 283 other side: 285 Rear brake side: 285 driver side: 283
M1 with ERD 583 Front brake side: 294 other side: 296 Rear brake side: 296 driver side: 294
M1 with ERD 589 Front brake side: 297 other side: 299 Rear brake side: 299 driver side: 297
M1 with ERD 559 Front brake side: 282 other side: 284 Rear brake side: 284 driver side: 282
M1 with ERD 602 Front brake side:303 other side:305 Rear brake side:305 driver side:303


I just made mine using Spank Flare 24 OC... and it looks sweet.

kubabike

Re: ZTTO MTB M1 Boost hubs 28H 54T Ratchet
« Reply #104 on: January 26, 2022, 08:06:45 AM »
Does anybody build a wheelset using ZTTO R2 hubs? I need spoke hole offset measurement. Thanks in advance :)