Rear hub motor on the front with 26x2 on Alex DM24, with no freewheel.
Rear is stock 26x4 to be switched for the red vee tire which is 26x3 as seen in pics.
Of note the stock 26x4 is quite loud with its designed tread.
Hub needs to be switched around to line up disc brake. I rushed putting it on, more focused on properly using gorilla tape on damaged phase wires out of axle, and t.a. fitment.
Also on the plans
- 5" riser handlebars black. - https://www.modernbike.com/sunlite-5-riser-bar-31.8
^Might go BMX handlebars, more handlebar real estate.
-
Keep the cheap thumb Shimano TX shifter.
No need to change it, plus it fits nicely with the brake lever and thumb throttle.
- Lower crank gear to 38
- 11-36 rear gears
- Wrap the frame in black electrical tape, orange is to flashy.
- Longer handlebar stem might be needed but I will see once I get the riser handlebar because that can always be rotated outward.
- 21x1.40 front rim with 21x2.50-3.00 tire which I hope equals the total height of 26x3 Vee tire rear
Of note the total height difference of the wheel and tire between the 26x4 and and 26x2 is 3"
The difference in height between my Trek 700x45C and 26x4 is 0.25-0.50" inches 700 being smaller.
Need to get my hands on and measure a 21x1.40 motorcycle rim.
Then figure out Duro/Mitas 21x2.75 tire.
Neat website below says 26.67 but doesnt seem right.
https://www.rbracing-rsr.com/tirediamcalc.html
Mitas E09 - 21 front 80/90 (2.50-2.75) - https://www.kimpex.com/en-ca/products/motorcycle/tires-wheels/motorcycle-tires/mitas-e09-enduro-trail-tire?sku=354046&keyword=mitas%20e09
80/100-21 is 3.00-3.25 pegs it at 27.3
View attachment 6
Rode with the second battery on top of the top bar. Wasnt the nicest feeling having that between the crotch. The shifter feels odd, its easy to push it up but takes effort to push it back. Will go back to rapid fire shifters. The 52V 40A 15Ah battery is pretty good going up hills with the 40A controller now that I have gearing to use.
View attachment 3
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I found a very interesting link in regards to motorcycle rims and tires.
https://ridewrightwheels.com/pages/motorcycle-tire-wheel-fitment-chart
Waaaay way down at the bottom
Some of the motorcycle tires have a lettering designation. The millimeter(mm) equivalent for it: MH - 80mm, MJ - 90mm, MM - 100mm, MN - 110mm, MP - 110mm, MR - 120mm, MT - 130mm, MU - 140mm, MV - 150mm
Fo example MU90-16 - 140mm wide, 90% profile, 16" rim To convert from millimeters to inches divide by 25.4 (1"=25.4mm)
Correct rim width may be critical to handling and stability. A tire which is installed on a wider than recommended rim will have a "flattened" profile, and a rider may easily reach the edge of the tread during cornering. A narrow rim will alter the tire profile, with a smaller contact patch during braking. Fitment to these rims may result in slippage or air loss. And roughly each additional 0.5" of rim width will be approximately 0.25" more in each tire width
Tire Diameter Calculation ( Just for information ) Most of the bikers will want to know a tire diameter (measured in inches). This formula is a quick way to get the tire diameter of those metric tires that are common on just about everything stock. For example a 200/55R18 would be around 26.7 inches tall and 7.9 (200mm/25.4) inches wide. Enter any three of the numbers into this formula to solve for the fourth. "R" means Radial and "B" means Bias tire. The bigger number (on the left) is the Section Width in millimeters (1"=25.4mm). The number to the right of the slash ("/") is the Aspect Ratio (percent of width). The "R" means Radial tire and the last number, far right, is the rim diameter in inches.
Tire Diameter = Rim Diameter + (2 x Aspect Ratio x Section Width) / 25.4
Example (200/55R18 tire): Tire Diameter = 18 + (2 x 0.55 x 200) / 25.4 = 26.7 in
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Calculator is https://www.rbracing-rsr.com/tirediamcalc.html
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Mitas E09 is 80/90-21
((2x80x0.9)/25.4)+21=26.7" tall tire.
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80/100-21 is 27.3" tall
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23" motorcycle rims are 3" wide.
I might as well add the charts in screen shot.
3 pics for front
I hope my local motorcycle junk yard has something available.
Good news is I see a 23x1.60 wheel. 1.60 good for 2.25 to 3.10 tire.
Now I need to find if tires are readily available and what size and what price. Kimpex dont sell no 23"
Bridgestone Trail Wing TW9 Motorcycle Tire 3.00-23 for $81usd.
Front Trail Wing 9 3.00-23 Tire - 142948
Shinko 777 Heavy Duty Cruiser Tire 130/60-23 is 29.14" tall but very wide.
Avon Cobra Chrome AV91 Front Motorcycle Tire 130/60R-23 (65V) Black Wall
This info came from an ebay search.
HONDA 78 XL250 FRONT 23"
I counted 36H
https://www.cyclechaos.com/wiki/Honda_XL250
Front Tire 3.00-23
Rear Tire 4.60-18
Alright so 3" wide tire means..... 1.60, 1.85, 2.15 rim width, 1.85 being standard.
Which means I can go down to 2.75" wide tire if I wanted to on a 1.85 rim.
https://www.blogotive.com/wp-content/uploads/2017/07/Motorcycle-Wheel-Rim-Width-for-Tires-Size.pdf
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Scratch all that, went down the internet worm hole again.
Schwalbe Tough Tom MTB Tyre 29x2.60
Average protection, average durability
https://www.schwalbe.com/en/mtb-reader/tough-tom
Sun Ringle MTX-33 29" Disc Rim, 36h - Black
internal/external: 26/33mm
ERD: 597mm
Internal Width of 26mm is good for 2.5-2.7
https://www.lightbicycle.com/newsletter/tire-size-chart-for-bicycle-rim.html
^^^^^^^^^^^^Blank 192mm spokes
Other rim options are to narrow in width for a fat tire 2.5+
Sun Ringle CR-18 Disc Rim (Polished) (29") (36H) (Presta) - 612mm ERD, Internal Width 18mm
Sun Ringle Rhyno Lite Rim (Black/Silver) (29") (36H) (Presta) - 611mm ERD, Internal Width 22mm good for 2.30 tire.
SE Bikes J24SG 29" Rim, 36H, NMSW, Black - 604mm ERD, Internal Width 24mm good for 2.40 tire.