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Re: Chinese Carbon Fat Bike Pic Thread Just finished building up this Pro Mance M6003 and KB Wheels in Yarmouth Maine.  I9 hubs and stem, HED. B.A.D. rims, Next R crank, Fabric saddle, Xpedo Spry pedals, Guide RS brakes, e*13 cassette.
March 03, 2019, 08:54:21 PM 		1
Re: ZTTO MTB M1 Boost hubs 28H 54T Ratchet Here's a detailed drawing of this hub.
March 05, 2021, 10:19:24 AM 		1
Re: Softail titanium MTB 29/27.5+ (all mountain - bikepacking) Weight : it is an estimation. Expected weight, around 2 and 2.3 kg. Not weighed yet, we'll see.
The rear suspension : the titanium plate flex is the pivot. The seat stays are flattened ton flex as well.
Cable routing : rear derailleur and dropper post = internal. Rear brake = external (easier maintenance etc.)

Other bikes with this "technology" :
Funk Cycles - La Ruta (2.2 kg frame)


Leon - Semita (10,5kg) or Montem (12,5 kg)



My bike is something between a hardcore hardtail and a trail bike. I hope i will enjoy it :-)
April 26, 2021, 02:23:47 AM 		1
Re: ZTTO MTB M1 Boost hubs 28H 54T Ratchet 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.
December 28, 2021, 09:11:45 AM 		1
Re: ZTTO MTB M1 Boost hubs 28H 54T Ratchet Built a pair of carbon hoops using these, came out pretty light for being "all-mountain" rims, just over 1600g. The spoke lengths Ztto provided was pretty much spot on.
June 25, 2022, 07:22:36 PM 		1
Re: ZTTO MTB M1 Boost hubs 28H 54T Ratchet I had the splines on the ratchet drive ring shear off yesterday.  The hub started making a sound when ratcheting, kind of a louder gyrating noise every time it clicked, so basically the same sound as the ratchet normally, but every few seconds it would start to get louder, then a few seconds it would get quieter.  Turned around and headed back to the car to see what was up, hoping it was just running low on grease or something.  Eventually I heard a pop and the cranks could just spin.  The hub-side ratchet was stuck in the hub and I couldn't get it free with the tools in the car, so headed home.  Pried the ratchet out to find all the splines sheared off.  I'm kind of thinking that the splines got too dirty and the ratchet started sticking down in the hub.  If the hub-side ratchet can't spring outwards, then the freehub-side ratchet would get pushed further inwards towards the hub, and maybe the weird sound I was hearing was the freehub-side ratchet making contact with the ratchet drive ring.  I'm thinking that eventually it got pushed so far inwards that maybe the splines from the freehub ratchet started to mesh with the ratchet drive ring?  Making it a fixie for an instant until it broke.

Contacted ZTTO and they are replacing the ratchet drive ring, but I have no idea how I'll get the old one out with stripped splines...
July 04, 2022, 01:26:42 PM 		1
Re: Himalo Frames? Still using 'er daily!

Decided to get a cumulative weight.

Me, with clothing, shoes, pocket schmoo: 180lbs

bike: 40-45lbs

Motor+battery: 20lbs

Other accessories - rack, headlights, kickstand, panniers: another 8-10 or so

Backpack: ~5lbs

Lock: ~5lbs

Groceries: 30-40lbs

Total rolling weight? Just shy of 300.

Not the heaviest thing out there. But definitely far from lightweight. Frame and other components have yet to skip a beat. Get shat on by the bike guys for using 'cheap' parts. But ya know what? 300lbs with a motor on it and nothing's showing any fatigue as of yet? I'm pleased as punch.

For the himalo 180 fork: it's not an oil bath system. It's just greased internally. The grease gets wiped away from the moving parts periodically. What I've done to minimize maintenance and labor time after seeing the inside (it's literally just bushings and a dust wiper) is replace the screws on the back of the fork with some low-profile grease fittings. Whenever it starts to feel like it's moving low speed bump sensitivity, I toss a pump or 2 of grease in there and cycle the thing. The stuff I'm using is just what I had on hand, NLGI2 silicone grease. Using a grade 0 semi-fluid grease would probably be better. But meh. Cheap fork = I can't be bothered to split hairs on maintenance. But so far, it's been a champ. I also put about 5ml of motor oil into the air chamber to take up some volume as I found I was hitting my front fender on bottom-out. Only thing I've noticed is that the compression adjust (lockout) seems to spin at the end of the clicks vs. coming to a firm stop. Functionality doesn't seem to be otherwise affected. Happy with it so far!

On the DNM rear shock: Nothing to note there. Haven't paid close enough attention to see if I've needed to add air or not since I tend to adjust it quite a bit depending on the riding I'm doing.

For the frame: Haven't had any issues with the bearings in there, or the pivots loosening up since I did that loctite+retighten operation. The paint on there will chip if it gets smacked by a rock. But the cheapest black satin primer/paint from the local store matches it close enough for my needs.

Rolling weight: https://imgur.com/DJFJE0w

Grease fitting: https://imgur.com/Wa8cd72
July 07, 2022, 12:07:14 PM 		1
Re: ZTTO MTB M1 Boost hubs 28H 54T Ratchet Just an update, ZTTO offered a warranty replacement on the ratchet ring, but said they couldn't make a shipping label unless I buy something else... wasn't going to use it anyway and was going to keep it as a spare, so I just won't bother.  I was surprised I was able to get the old ratchet ring out with how little spline was left, took a bit of heat and a lot of torque.  I purchased the OE DT ring (HXDXXX00N1131S) and got it back together, all is good!  Comparing the ZTTO ring with the DT ring, the splines on the ZTTO ring are smaller, so a tighter fit with the ratchets.  I've got a few ratchet kits laying around, and the Fonvo 54t ratchet actually gets stuck in the ZTTO ring, but slides freely in the new DT ring.
July 11, 2022, 08:49:50 AM 		1
Re: Bafang I installed two, the BBSHD and BBS02 on used aluminium frames.
Both were an install and forget experience.
They are still running fine after a couple of years with no maintenance.
The first with a Stormey-Archer 3 speeds. The other with a 8sp drivetrain.
There are plenty of parts and accessories available on aliexpress.
I look forward someone ask me to build one on a carbon frame with their more recent versions.
November 16, 2022, 12:35:41 PM 		1
Re: New Lexon spirit I am becoming captivated with the Spirit frame. 

I have been researching more about this frame and have started communications with Lexon.    It appears that the Scott Spark has a head tube angle of 66.5 degrees, with ZS56/28.6/40.0 Integrated cable headset cups.  One can install zero offset cups or keep the cups that allow one to rotate them for a either a HT angle of 65.8 or 67.2.

Head tube differences:

The Spirit has a fixed HT angle of 67.2 degrees that uses a IS52/IS52 integrated cable Headset. 

The Spark uses what appears to be a custom Acros angle headset: https://acros-components.com/en/headsets/angle-headset-1-52/52?number=310.52.591F-HT110AM&c=46
(These headsets have protruding pins in them that allow them to be flipped 180 degrees.  The Scott Spark has little notches machined into the Head tube portion of the frame to clock/orient the cups and hold them in place.)

I asked Lexon if their Spirit has this feature/provision, and if not, can they add the grooves.

Rear shock differences.   
I believe it is known that the Scott Spark uses 2 versions of custom Nude5 shocks with a mid position set point.  The Spirit uses either the Rockshox Deluxe Selected+, or Rockshox Deluxe RLC3 with remote.  Both of these shocks have their air fill port located coming out the side of the end of the shock.  This makes one have to remove the shock in order to add air/adjust the pressure. (Not fun to do if you are out in the field.)

Frame differences. 
Scott uses a BB92 bottom bracket and the Spirit uses a BSA73.
There are some very slight differences in the front section of the frame geometries, resulting in slight wheelbase differences.  Scott Large = 1190, lexon Large = 1181.

I can't predict if these small difference would affect handling or the ride.  I suspect the Spirit using T800/T1000 fibers would have more of an impact versus Scott's use of carbon nanotube reinforced epoxy resin and T1000G fiber.
November 16, 2022, 01:45:08 PM 		1