Recommend me a new 700C rear wheel ( or rebuild 26" hub?)

[Scorpio]

Hi everyone, I'm looking at options to change my 26" kit to 700C/28" and wonder if anyone knows of any suppliers who have sales on now?
Any recommendations for a particular hub to look for? rpm? I weigh near 100kg, most use is on B-road and I'd prefer a high cruising speed to high torque.
The wheel I'm now using is a 350W 26" rear from Yose with cassette fitting, disk brake, 70cm cable with Juliet connector (with speed sensor).
I was looking to re-rim the wheel I have but could be tempted to buy a new wheel if I can find one to suit.

I'm in Portugal, options include :
1. Buy a new 700C wheel in the UK ( and have it added to a UK delivery that's being sent to me in Portugal in a few weeks), any recommendations?

2. Strip my Yose 26" wheel, rebuild with new 700 rim & spokes (include post = £30 Bankruptbike parts rim + £30 Ryan spokes ?), but I have another bike I can use this wheel on if I don't strip it.
Does anyone have dimensions for the Yose 350W rear hub - I measure the spoke holes as a 127mm diameter circle ?

3. Buy a new 700C rim in EU (so no need to ship in / out of UK)
£140 (complete kit as an example but just a whhel would be better) https://yosepower.com/collections/e-bike-conversion-kit/products/36v-250w-28-rear-motor-kit-for-freewheel

4. Build a new wheel from scratch
eg £75 https://www.greenbikekit.com/electric-motor-engine/rear-bldc/e-bike-cassette-freewheel-hub-motor-36v-250w-light-weight-high-speed.html + £60 rim & spokes.

A bit of background :
A friend in the UK will be sending me a crate in a few weeks, I can get any parts added to the crate to come out to Portugal.
This follow my earlier thread asking about rebuilding my 26" wheel https://www.pedelecs.co.uk/forum/threads/suggestions-please-how-to-modify-a-26-kit-to-suit-a-29er-bike.40437/

I've found some good info on a similar thread https://www.pedelecs.co.uk/forum/threads/wheels-rims-and-spokes-to-be-precise.40659/#post-609311

Any help appreciated

 

[Nealh]

Q100cst a bit small for 100kg rider though if you keep the current to not more then 17a it might be ok, the 128c will be better.

AKM-128CST 48V500W Rear Driving Hub Motor 36holes with 20/26inch/700CC wheel rim [AKM-128CS 48V500W motor 26/700cc] - $145.00 : Zen Cart!, The Art of E-commerce (topbikekit.com)

Q128C-135mm 500W Rear Driving EBike Hub Motor Wheel RPM 201 Voltage 36V (bmsbattery.com)

Conversely use it as 36v as in in over volting the opposite will occur, a 48v 328rpm will be circa 260rpm at 36v and a 48v 260rpm will be a circa 201rpm at 36v.

 

[Scorpio]

Thanks @Nealh - I've been waiting for replies from a couple of people in UK hoping I can avoid buying from China but no luck (hence my slow replies - apologies !).

Cost of new hubs is a more than I was expecting, bare motors are approx Euro 100 + 40 postage, built wheels are £120 + same again for postage (no surprise bare hubs are cheaper to post than built wheels but the difference is huge).

I'll wait for a couple of days after Easter in case the folk I've emailed are off for a weeks holiday then will be ordering bits, stripping my wheel to rebuild in a 700c rim looks most likely.

Bankrupt ... have deep rims to match my front, ERD=588 mm.

HYBRID BIKE RIM RODI AIRLINE PLUS 700c (622x19) DEEP SECTION WHEEL RIM 36 SPOKE

RODI AIRLINE PLUS VERY DEEP SECTION DUAL WALL RIM FOR TREKKING HYBRID XC BIKES PROVIDING EXCELLENT RIGIDITY RODI ARE A RENOWN EUROPEAN CYCLE WHEEL RIM MANUFACTURER MADE FROM 6063 ALUMINIUM 28mm DEEP SECTION RIM EYELET SPOKE HOLES WEAR LINE INDICATOR, NON MACHINED CAN BE USED FOR

www.bankruptbikeparts.co.uk

I measure my Yose 350W hub as 36 spoke holes, 120mm diameter, hub width 45mm, does anyone have a diagram or spec to confirm this for me? The spokes on there now are all the same length so I'm guessing I don't need to order different lengths when I do my rebuild?

Putting my measurements into a spoke calculator says I need spokes 250mm long, does this sound right? https://www.wheelpro.co.uk/spokecalc/

 

[Nealh]

spokes 2mm not 1.4mm.

 

[Scorpio]

Edit for future reference: I have 3 hub motors here to compare, the hubs on all measure 130mm (spokes) not 120mm (I know what I measured - and it wasn't the spokes, glad I noticed before I ordered anything !) Oops

 

[Scorpio]

Iif anyone is looking for a UK supplier of motors / kits (not a recommendation - just info) an option is https://www.thebikeshed.online/ebike-parts

Background https://www.pedelecs.co.uk/forum/threads/q100cst-from-bms-i-requested-the-201rpm-motor-but-they-have-sent-the-328rmp-motor.41129/

 

[Scorpio]

Important notes:

Ignore post#3 above, calcs are wrong as hub diameter is 130mm not 120 mm
Do not use these calculations - your rim diameter will be different to mine - used as an example only !

An update for future reference :
Spokes (qty 40, length 234mm) https://www.spokesfromryan.com/product/sapim-leader-spokes-black-j-bend/?attribute_pa_length=234
Nipples https://www.spokesfromryan.com/product/silver-brass-polyax-nipples/?attribute_pa_size=14mm
Rim came from Bankrupt Bike Parts and has ERD of 588mm.

The wheel runs true *but* the rim is centred between the hub flanges, the spokes bottom out when I try to offset the rim to compensate for the gears.
Summary: it works but it's offcentre between the rear stays

The finished article can be seen at https://www.pedelecs.co.uk/forum/threads/yose-350-rear-hub-kit-transplanted-onto-scott.40186/post-621665



It's progress

 

[Jodel]

Just for reference, I've had good results (accurate to 0.5mm) with the spoke length calculator on the 'Grin' website:

Online Spoke Calculator for Hubmotors and Ebikes

Our handy spoke length calculator allows for easy calculation of spoke length for custom builds - and is the only one of its kind to include paired spoke holes in the flange as is common with many large diameter hub motors. It also creates an automatic side view drawing of the laced wheel and...

ebikes.ca

If your spokes are bottoming out on the drive side, have a read at some of the info on the Grin site - you might just get away by relacing with an all 'elbows out' build. Their videos are quite good too.

I've also used spokesfromryan and Custom Cut Spokes:

Custom Cut Spokes - Your one stop shop for Bicycle, Scooter and E-Bikes spokes

Custom Cut Spokes offers bicycle, scooter and ebike spokes cut to order in almost any length spoke. No minimum order, and shop online anytime!

www.customcutspokes.co.uk