ET MAX observed changes to the T4 Master EX30 line

[Julianjc84]

So what's different about a ET MAX to a MASTER V4 / EX30?

here are my observations. from EUC UPGRADES video 

 

ETMAX: 90+mm wider to support stanchions to support 90/90 tyre
T4 / MASTER  /EX30 89mm max stanchion horizontal width

 

ETMAX: Stanchions seem to be coated with some kind of material? appears to still be using brass n graphite bushings judging from the grub screw. Need to disassemble to inspect.
T4 / MASTER  /EX30 use a 2mm Stainless steel raw tube. that is lubricated from the brass and graphite dry lube bushing.

 

ETMAX: has the motor cable running on the inside, this now sacrifices a motor bolt on the cable side. Only 3 bolts
T4 / MASTER  /EX30 motor cable runs on the outside of the stanchions and you get 4 motor blots on the motor cable side.

 

ETMAX: what appears to allow for 4 bolts at the bottom top H bar mount. There was no camera angle to confirm but appears so with assumptions.
T4 / MASTER  /EX30 top of the stanchions to the H bar. only have 2 bolts on motor cable side and the motor cable support bracket acting as a half bolt. pretty weak and sus.

 

ETMAX: Now appear to have Tapered motor bolts to prevent rubbing on stanchion slider. as well as use of lock washer and nylon washer?
T4 / MASTER  /EX30 use lock washer + SS washer + over tightened crushing the aluminum stanchion frame.

 

ETMAX: New plate that is mounted to the batteries up the sides. that sits stranded off the stanchion frames. and mounted to the bottom of the stanchion pole. The Pedals also mount to this plate that allows higher pedal height and saves abot 20mm at the bottom of the pedal hanger bracket
T4 / MASTER  /EX30 Features 80-100 relative travel that is actual travel of ~70mm Master ~85mm T4  ~90mm EX30. With extension poles the master can be pushed to 110 travel however the bottom hanger collide with the rubber of the Tyre. I see how ETMax gets 130mm now.

 

ETMAX: New top housing, that has rear section of the linage area cut open to allow better geometry and linkages to move up and into the top controller housing zone
T4 / MASTER  /EX30 handicapped geometry from the frame housing.

 

ETMAX: Vertically aligned frame linkage mount points.
T4 / MASTER  /EX30 Same Linkage points vertically aligned.
EXTREME: Offset vertically aligned linkage mount points.

 

ETMAX: Single charge port under unit. makes for better waterproof top case.
T4 / MASTER  /EX30: Dual linked charge port on top of housing that potential for water and dirt bulidup.

 

ETMAX: Side view
T4 / MASTER  /EX30: its uncanny similar to this breed. Can be seen how fast BEGODE releases.

Edited February 14 by Julianjc84

[Planemo]

Interesting observations, thanks for putting that up. Couple of my own:

1. Weird how they went to just one charge port. Anyone know what the max charge possible is on the ET Max? If it's around 15A, I'm not convinced a single GX20 would be happy at that. And if it is, why fit 2 on the EX30 etc?

2. I suspect that stanchion coating, as lovely as it is (similar to MTB's/FastAce) won't last long at all on a dry lube setup.

3. Proper top-out bumpers as opposed to the EX30 crappy O rings.

Cheers for pointing out the tapered motor bolts. Nice mod, might do that myself on my EX30. I'm fairly sure mine aren't touching the stanchions but they are indeed very close.

[Vince.Fab]

It looks like they increased the thickness of the H Bar (crossbrace).  This was a weak point in the previous models.   Also like how they choose not to use the same cut away motor mount like the Exteme to gain ground clearance. 

As someone who's broken two sets of motor mounts and a H Bar, this setup looks great to me.  

 

 

[Julianjc84]

38 minutes ago, Vince.Fab said:

It looks like they increased the thickness of the H Bar (crossbrace).  This was a weak point in the previous models.   Also like how they choose not to use the same cut away motor mount like the Exteme to gain ground clearance. 

As someone who's broken two sets of motor mounts and a H Bar, this setup looks great to me.  

 

 

Looks like they have added a notched section between the H bar and the Stanchion sliders. might help with twisting and alignment.

[Vince.Fab]

The Extreme is also notched but honestly I would have liked them to step up the bolt size too. 

What's a little funny is that they still have the design flaw, 0.030" thick wall on the bolt hole countersink. Thickening that wall has a huge effect on the part strength and that's what basically holds everything together.