Well I try again with jet another picture hosting site.
I have been very busy lately building 2 new Sets of Wheels with 19” Mc rims for my Stealth Bomber. I decided to switch out both the front rims and the rear rims. Why 2 sets of wheels, well for the easy convenience of being able to switch tires or wheels in this case, for different types of riding fast an easy. This Bike is a daily rider. So all down time is a bad thing.
I have made a list of all the parts being used for this build to make it easier for those who want to do the same. I have not being able to find anyone else here that has converted their front wheel to 19” Mc rims.
The rear wheel has been upgraded with Hubsink and Ferro Fluid. All spoke nipples and spokes have been powder coated black. This I had to do myself. Well I did all the work myself.
Back Wheel With Crystalyte 5403 Motor, Parts List
19” X 1.85” Notako Excel Rims (Black)
36 X 125mm Buchanan’s 10 Gauge Stainless Steel Spokes (Powder Coated Black)
36 X Buchanan’s N10329S 10ga / .320” X .900” Stainless Steel Nipple (Powder Coated Black)
70 / 100 CST Surge Tires
70 / 100 Biltema MX Inner Tube
1.5” X 19” Rim Tape
Hub Sink 735mm Circumference, with two additional 30g HY880 Thermal Grease + 8-10 mL Ferro Fluid (according to Grin Technologies)
Biltema High Temp Silicone
e-bike technologies Gore–PMF-100600 Water Proof Vent Valve / breather port
Shimano Deore XT SM-RT86 203 mm Disc Rotor
4 Oz ½ Bottle of Orange Seal (Tubeless Sealant Injection System) 8 Oz Bottle
Shimano Saint Brake Calipers and Brake Handles
1 X Bullet valve cap
Original front wheel hub Bought from Stealth drilled out and all edges chamfered to prevent spoke failure in the future.
A Gig I made up so the spokes would fit in to my Powder Coat oven. All spokes and nipples powder coated shiny black. All spoke threads greased with Super Lube to prevent locking up and make truing of the wheel impossible in the future.
All gaps and holes sealed with High Temp Silicone. Vent holes plugged with Metal Epoxy and silicone. To prevent the Ferro fluid from being flung out of motor when spinning.
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Waterproof Vent Valve. To prevent overpressure when hot (risking blowing silicone seals, highly unlightley but) and the motor sucking in moisture when cooling down.
Ferro Fluid Enough for 2 motors. I added first 10 mL (as advised by Grin Technologies) and took note of the motor drag and added another 10 mL just to check without any noticeable increase in drag. Or any measurable decrease in performance. So I used 2 X 10mL (more is always better Right). The Ferro Fluid also seems to quiet down the motor somewhat, which is nice.
203 mm Disc Rotors front and back.
Shimano Saint brakes front and back. These are just SICK Can block wheels at any speed on any tarain if not careful. But you will get used to them. Highly recommended upgrade.
Front Wheel Parts List
19” X 1.85” Notako Excel Rims (Black)
36 X 220mm Buchanan’s 10 Gauge Stainless Steel Spokes (Powder Coated Black)
36 X Buchanan’s N10329S 10ga / .320” X .900” Stainless Steel Nipple (Powder Coated Black)
70 / 100 CST Surge Tires
70 / 100 Biltema MX Inner Tube
1.5” X 19” Rim Tape
Shimano Deore XT SM-RT86 203 mm Disc Rotor
4 Oz ½ Bottle of Orange Seal (Tubeless Sealant Injection System) 8 Oz Bottle
Shimano Saint Brake Calipers and Brake Handles
1 X Bullet valve cap
Bullet valve caps Bought on Ebay Looks real and goes well with the gold and black them on my bike, I think anyway.
The firs sett ready.
Back wheel with Hubsink. He had to make a custom piece to fit the 5403 Motor. There were not enoch heatsink paste provided so I used 1.5 tube of 30g extra. All along the edge between the hubsink and the motor housing there is a bead of Black Tec 7 to prevent the cooling paste to be flung out under high speed.
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In conclusion. Yes the Bike has gained some weight compared to the original wheels. I would say about 5 Kg or 10 Lbs in total for both wheels. Witch isn't to bad considering much more solid tires and increased reliability. Not to mention much easier accesses to spear tires in the future. Especially here where I live. To order 2 new Duro Razorbacks will set you back about 500 USD here and they don't last very long on such a heavy bike.
And yes the Ferro Fluid seems to work Wonders. The Hub Sinks seams to become hot to the touch after a few small hills. Something you would not bee able to feel on just the Motor housing without this modification. And the heat needs to somewhere, so it’s better to heat up the air in the atmosphere then to put it back in to your stator and cocking your copper coils and magnets and frying your motor. The summers are relay hot, and the winters are very cold here where I live.
And now for the Problems. Not mentioning the biggest and most obvious the weight increase as mention before and the cost of this upgrade.
So I had to mill down an edge on the motor housing to make the Shimano Disc Rotor fit. Using the old motor as a guide.
Except for that I dint really have any problems except fitting the tires. Witch are extremely stiff. But with some excellent help from Rix and youtube and some serious sett of kit i managed to fit the tires quite easily. I guess you could even run these tires without any air in your tubes on the back wheel.
