20" folding ebike front suspension retrofit options?

[goldconch]

I'm hoping someone with more folding bike headset experience can help me: I'm shopping for a front shock suspension fork for my 20" folding Qualisports Dolphin with disc brakes. I'd prefer to swap-in a quality magnesium product rather than the cheaper cr-mo alibaba stuff (which would be heavier than my stock aluminum forks). Is there any manufacturer that makes a quality retrofit for ebikes with std BMX 20" x 2.40" tires? Is there anything out there for this bike?

Appreciate any help from those that may have done this before.

HEADSET:
Custom, Internal Cups, Straight 1-1/8"
STEM:
Custom Aluminum Alloy, Folding, Telescoping Height, 290mm Base Height, 170mm Extension, Quick Release Clamp, 25.4mm Clamp Diameter

Looking for something like this, but in correct size:

...rather than this (which seems to be the correct 10cm width for my wheel):

 

[Nova Haibike]

I'd prefer to swap-in a quality magnesium product rather than the cheaper cr-mo alibaba stuff (which would be heavier than my stock aluminum forks). Is there any manufacturer that makes a quality retrofit for ebikes with std BMX 20" x 2.40" tires? Is there anything out there for this bike?

The Suntour XCM HLO AIR SL 20 will accommodate tires up to 2.3". Also available is the RST Spex; they do not indicate a maximum tire width.

 

[harryS]

Timpo, snow bike on aliexpress or ebay means 135mm. fat tire forks, but that's a good price on the Pasak's.

 

[goldconch]

Thanks @Timpo those look to be 4" fat tire/"snow bike" (per alibaba) forks, and won't match the 10x100mm fork dropout for this project, but I will bookmark.

If I can recover from the mildly offensive inference that I'm a kid bike rider, the Suntour XCM HLO Air SL 20 that @Nova Haibike suggested might fit, but list a 9x100mm fork dropout...The RST Spex 20 15/9, though interesting, are also not a perfect fit. Maybe I could grind out a 1mm if I needed it and add some washers on a longer hub axle...I'm fully expecting to have to mill off the top of the steerer pipe anyway, so the toolbox will be out. I don't want to trigger cascading expenses of having to buy a new front wheel and axle, milling etc.

The Suntour are 1780g (almost 4 lbs), and the lightest of four RST, the 9Air, are 1,800g, about the same.

It seems like we need more e-bike riders to drive the customizing component aftermarket.

Appreciate the helpful links - these will certainly help others too.

Update: Rep from Suntour says their youth-specific XCM NLO Air SL20 max tire width is 58mm and are not for adult use.

 

[OZZZ]

How did you go with this goldconch? I'm looking to replace my 20" forks with something with some adjustment, they are horrible..

 

[harryS]

If you wanted 100mm dropouts and you bike is 1-1/8 threadless.

Air shocks

158.57US $ 27% OFF|Pasak Mtb Fork Air Suspension 20 Inch Disc Brake Matte Black Travel 100mm Dropout 100mm Qr 9mm Steering 28.6mm Folding Bike Part - Bicycle Fork - AliExpress

Smarter Shopping, Better Living! Aliexpress.com

www.aliexpress.com

Spring/Oil shocks

BUCKLOS Suspension Fork 20/26/27.5/29" MTB XC Bike 1-1/8" Disc Brake Lockout QR | eBay

Find many great new & used options and get the best deals for BUCKLOS Suspension Fork 20/26/27.5/29" MTB XC Bike 1-1/8" Disc Brake Lockout QR at the best online prices at eBay! Free shipping for many products!

www.ebay.com

 

[OZZZ]

Thanks harry, I'll look into those, either would be better than the OEM clunkers!

 

[vivusvanlife]

Did anyone find a suitable set of air forks for their 100mm front wheels? I have a mate City and while I've replaced the rear shock, the front one desperately needs upgrading as it's terrible.
I had narrowed it down to the suntour xcm 20 and the risse rst spex 20, but both are kids forks that I worry will struggle with adult weights on a heavy e bike.
I'm hoping to hear a success story to fill me with more confidence