It has a rear hub motor wheel purchased by Yose Power about two and a half years ago. I am very happy and can recommend it to anyone with confidence. However, since the rim has completely failed, it needs to be reconstructed.
The sticker is listed as 36 holes in “HJC Centerial DA-250 26” 559x19 ALLOY 6061-T6. " Ideally, you just want to know the ERD (outer diameter) to rebuild with a new rim. If you know where you can re-purchase the same rim, you may buy another one to save time (Spoke is fine…).
If you have any information, it will be very helpful… Otherwise, we will measure the ERD by ourselves and post it here in case others need it.
Thank you.
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The same rims and ERD procurement cannot be helped.
If you need to rebuild the wheel, you’ll choose a rugged tooling rim like Ryde Sputnik and a single cross-pattern Sapim strong spoke. The flange diameter of my Shengyi rear motor hub is 156mm. I tried the twin cross pattern on the 700C wheel, but the angle of insertion of the spoke was too sharp, and the spoke broke after a while (because it was used in tandem, it was a “heavy duty” condition). There may be no problem for solo use.
I do not know the flange diameter of your motor, but I definitely want to choose a single cross pattern with a 26 inch wheel.
As you may not know, the Grin site in Canada has excellent spoke length calculation tools and commentary videos.
If you choose a rim like Sputnik, first get the rim and measure the ERD yourself. Sputnik is highly evaluated in terms of strength, but even for the same type of rim, the ERD may vary by several mm.
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Die Yose verwendet eine kleinere Dia-Nabe, ich denke, 129mm oder so. Ich habe eine 2x Schnürung für meine mit 14g Sapim Strongs.
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Hello. Old spokes can be used without problems with front wheels or lightweight riders. Spoke breakage on the rear wheel can be a problem with the weight rider. Rim options may be limited. There are two important information to help you choose the rim. The first is the disc brake or rim brake, and the second is to measure the cross-section height of the rim. My rear wheel YOSE 700 rim was about 25 mm high.
If you use disc brakes and the rim height is 25 mm (probably so), we recommend the following rims or similar. You may be able to procure from a UK supplier.
When changing the rim, loose all the spokes first, and tape the old and new rims together. After that, divide the nine groups from the nearest spokes and replace them. At first, the wheel is adjusted and tightened by starting from the drive side. Protect the cable end and avoid damaging electrical cables and connectors.
Valve holes may need to be enlarged for different valve types. Use of rims with eyelets is not recommended. Because the hole is slightly narrow and the large spoke nipple may interfere, the spoke may bend and fatigue damage in the nipple part.
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That rim looks good. Because there is no eyelet, if you use the original electric bicycle thick spoke and nipple, you can enlarge the spoke hole a little if necessary. When using genuine spoke, cross pattern change of spoke is not possible. Unfortunately, additional costs are increasing due to Brexit. sjs cycles uk has a choice, but we don’t see anything that fits without a spoke change. Some users use AliExpress, but I am unused.
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When using rim brakes, steel rims may be a wise option because they withstand more wear than soft alloys.
If the spoke spanner is a cheap multi-size type like I do, block all unused nipple gaps with tape. This saves hours, but the dedicated spoke spanner is still the best;)
If the spoke size is unknown - Amazon Prime is easy to return… 
The steel rim, which was fitted to Claude Butler’s racer in the 1960s, is remembered to have a very inferior braking force even when the Weinman center pull brake, which was at the time the highest peak, was combined. If you combine a remodeled bike with steel rim and rim brake, you can’t imagine how dangerous it is!
I agree with what saneagle always claims - - disc brake is the correct answer. He concluded that aluminum rim wear is always intense on electric bicycles, but can be reduced by careful choice of pads. If it is a hard pad, the rim should be consumed rapidly or replaced frequently with a soft pad. I use a soft pad of Clarks Elite or BBB Tristop. Shimano’s pads were the worst on non-electric bikes. It produces a very hard, gray “paste-like substance” on the rim, which scrapes the rim and produces aluminum shavings, which feed into the pad.
As for the rim, Ride Andrea’s rim seems to have a thick and wide brake surface developed for touring bikes and tandems, but I still didn’t have to replace the rim!
hi buy that whihc you find very helpful as it is totally your choide i will ask you to read reviews on famous webistes.
