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expiredthe-press-box posted Dec 19, 2024 11:58 PM

27.5" Haven Bikes Power Wave 250W Step Thru Electric Hybrid Bike (Small or Medium)

$450

$900

50% off
+ Free Shippingat Mendham Bikes
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Deal Details
Mendham Bikes has 27.5" Haven Bikes Power Wave 250W Step Thru Electric Hybrid Bike (Silver, Small or Medium) on sale for $899.99 - $449.99 with discount code RIDETHEWAVE during checkout = $450. Shipping is free.

Thanks to Staff Member the-press-box for sharing this deal.

About this Item:
  • The Power Wave features a lightweight aluminum frame and fork, rear luggage rack, front and rear fenders and a versatile 8 speed drivetrain. The hydraulic disc brakes provide excellent stopping power. It's 250 Watt, 36V Mid-Drive Bafang motor will provide an extra power boost with higher effort pedaling, thanks to its intelligent drive unit.
  • Max Weight: 250lbs.
  • Boost Engage: Pedal Assist

Editor's Notes

Written by SaltyOne | Staff
  • Rated 4.7 out of 5 stars from customer reviews.
Please see the original post for additional details & refer to the comments below for discussion.

Original Post

Written by the-press-box
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Mendham Bikes has 27.5" Haven Bikes Power Wave 250W Step Thru Electric Hybrid Bike (Silver, Small or Medium) on sale for $899.99 - $449.99 with discount code RIDETHEWAVE during checkout = $450. Shipping is free.

Thanks to Staff Member the-press-box for sharing this deal.

About this Item:
  • The Power Wave features a lightweight aluminum frame and fork, rear luggage rack, front and rear fenders and a versatile 8 speed drivetrain. The hydraulic disc brakes provide excellent stopping power. It's 250 Watt, 36V Mid-Drive Bafang motor will provide an extra power boost with higher effort pedaling, thanks to its intelligent drive unit.
  • Max Weight: 250lbs.
  • Boost Engage: Pedal Assist

Editor's Notes

Written by SaltyOne | Staff
  • Rated 4.7 out of 5 stars from customer reviews.
Please see the original post for additional details & refer to the comments below for discussion.

Original Post

Written by the-press-box

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257 Comments

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Dec 26, 2024 10:52 PM
22 Comments
Joined Jun 2019
OffshoreBearDec 26, 2024 10:52 PM
22 Comments
Quote from Taint :
Anyone have thoughts on Vitesse Flare? https://mendhambikes.com/products...esse-flare
I got one when they were $260. I wouldn't bite at $700; I would rather spend a little more and get something like a Ride1UP.

"KEVCENTRALFLARE" should knock 35% off the Flare though.
1
Dec 27, 2024 12:44 AM
204 Comments
Joined Mar 2014
espesyalDec 27, 2024 12:44 AM
204 Comments
Quote from acbharath14 :
If someone's 5 feet 2 inch, which size should I buy?
Small
Dec 27, 2024 12:45 AM
204 Comments
Joined Mar 2014
espesyalDec 27, 2024 12:45 AM
204 Comments
Is there anywhere you can buy an extra or spare battery for this? There's a battery for Haven power flow in aliexpress but I don't know if its the same battery as this
Dec 27, 2024 2:39 AM
640 Comments
Joined Sep 2014
acbharath14Dec 27, 2024 2:39 AM
640 Comments
Rolled the dice. Fingers crossed.
Dec 27, 2024 7:31 AM
94 Comments
Joined Jul 2005
GCGuyDec 27, 2024 7:31 AM
94 Comments
Bought one with 10% cashback, hope it arrive in good package
Dec 27, 2024 2:05 PM
247 Comments
Joined Dec 2007
nilusprotocolDec 27, 2024 2:05 PM
247 Comments
I'm going to take a chance on this too and see what happens. It also appears this Haven company is the same as univega, maybe.

https://www.univega-usa.com/colle...rts?page=6

I got my wife one of the Kent hub drive 250w and even though that doesn't have much power it works well around the neighborhood. My casual understanding is the mid drive should work even better.
Dec 27, 2024 9:27 PM
640 Comments
Joined Sep 2014
acbharath14Dec 27, 2024 9:27 PM
640 Comments
Quote from espesyal :
Is there anywhere you can buy an extra or spare battery for this? There's a battery for Haven power flow in aliexpress but I don't know if its the same battery as this
Mailed the original manufacturer on haven bikes. will let you know.

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Dec 27, 2024 10:10 PM
195 Comments
Joined Mar 2015
MartogDec 27, 2024 10:10 PM
195 Comments
Quote from acbharath14 :
Mailed the original manufacturer on haven bikes. will let you know.
While my spidey sense is tingling a bit about this seller and brand, I've got a good bit of experience wrenching on all types of bikes and building DIY ebikes, so I decided to take the gamble as well. As long as the bike comes with a functional Bafang M400 system, everything else should be manageable. The M400 system is older but still respectable.

As far as the battery, I won't be sourcing an OEM replacement unless they are blowing them out dirt cheap. It's likely you can have the OEM battery rebuilt with better cells if needed - once the original battery sags - which should be years from now.

If you're looking for greater range, you should be able to wire in a second battery in parallel to supplement the existing battery. These M400s should be simple two wire power systems allowing you to plug in any battery matching the OEM specs of 36v. Heck I'll probably mount up an adapter for a Ryobi 40v (36v nominal) battery since I have that handy. The Ryobi's are nice as they contain their own BMS and it's hard to kill them.

But this being a mid drive, you can extend your range simply by reducing the PAS level and contributing more of own power - that's always the cheapest fix!

If you wanted, you could convert the whole system to 48v by replacing the controller with the 48v version and a matching battery. Not sure that's needed in this style of bike tho.

Has anyone received their bike already? If so, can you tell us whether the connector on the cable going into display is round or triangular shaped? If round, it is likely that the power systems can be re-programmed and customized using Bafang utilities.

Fingers crossed that they actually deliver these bikes. If so, I can make a little comparison with the Yamaha e-bikes we also bought on that deal.
Dec 28, 2024 5:18 AM
640 Comments
Joined Sep 2014
acbharath14Dec 28, 2024 5:18 AM
640 Comments
Quote from Martog :
While my spidey sense is tingling a bit about this seller and brand, I've got a good bit of experience wrenching on all types of bikes and building DIY ebikes, so I decided to take the gamble as well. As long as the bike comes with a functional Bafang M400 system, everything else should be manageable. The M400 system is older but still respectable.

As far as the battery, I won't be sourcing an OEM replacement unless they are blowing them out dirt cheap. It's likely you can have the OEM battery rebuilt with better cells if needed - once the original battery sags - which should be years from now.

If you're looking for greater range, you should be able to wire in a second battery in parallel to supplement the existing battery. These M400s should be simple two wire power systems allowing you to plug in any battery matching the OEM specs of 36v. Heck I'll probably mount up an adapter for a Ryobi 40v (36v nominal) battery since I have that handy. The Ryobi's are nice as they contain their own BMS and it's hard to kill them.

But this being a mid drive, you can extend your range simply by reducing the PAS level and contributing more of own power - that's always the cheapest fix!

If you wanted, you could convert the whole system to 48v by replacing the controller with the 48v version and a matching battery. Not sure that's needed in this style of bike tho.

Has anyone received their bike already? If so, can you tell us whether the connector on the cable going into display is round or triangular shaped? If round, it is likely that the power systems can be re-programmed and customized using Bafang utilities.

Fingers crossed that they actually deliver these bikes. If so, I can make a little comparison with the Yamaha e-bikes we also bought on that deal.
Do you have any experience with reputable place for battery rebuilds? Just to know in case needed in future. Thank you
Dec 28, 2024 5:38 AM
195 Comments
Joined Mar 2015
MartogDec 28, 2024 5:38 AM
195 Comments
Quote from acbharath14 :
Mailed the original manufacturer on haven bikes. will let you know.
Quote from acbharath14 :
Do you have any experience with reputable place for battery rebuilds? Just to know in case needed in future. Thank you
Your local e-bike shop should be able to do it or will likely be able to refer you to someone else local. That's a better option since shipping hazardous lithium batteries can be a hassle.

But there's really no sense in worrying about it now as you should get years of service out of the original pack anyway. And within the lifespan of the original pack it is likely that vendors and even battery tech could change. I'm still running on one pack that is more than 9 years old. And in that time cells have become much more robust and higher capacity. We may even be replacing these lithium ion packs with Lifepo4 or even sodium batteries.
Dec 28, 2024 6:31 AM
65 Comments
Joined Dec 2024
FairPassenger4373Dec 28, 2024 6:31 AM
65 Comments

Our community has rated this post as helpful. If you agree, why not thank FairPassenger4373

I found this in the comments of a kevcentral YT video.
2 weeks ago

My parents just ordered a pair of the Haven Power Wave 27.5 mid-drives from Mendham. They're $899 each before 25% coupon, so $675 after the discount. I'm really looking forward to checking those out.
12 days ago

Update, I would reconsider purchasing this bike. The two that my parents ordered arrived today I went over to check them out. Both of them could not be assembled due to major issues with the forks. One was completely welded crooked where the disc brake mount on the fork completely interfered with the rotor. The other bike had some caliper mount alignment issues that could be solved with some shims between the hub and the rotor, but the fork legs were spaced nearly 3/4" too narrow (81mm spacing as opposed to 100mm). Additionally, the description on the website says the batteries are UL tested, but that is not true. There are no UL markings anywhere on the bike or battery. With all the lithium battery fires, I would be a bit weary about these bikes. My dad is likely going to send them back. I hope they will provide him return labels without charging. The boxes were in rough shape when they arrived, too. Maybe you'll have better luck, but I wouldn't expect much. Usually, if something seems like too good of a deal, it probably is.
3
Dec 28, 2024 6:43 AM
640 Comments
Joined Sep 2014
acbharath14Dec 28, 2024 6:43 AM
640 Comments
Quote from FairPassenger4373 :
I found this in the comments of a kevcentral YT video.
2 weeks ago

My parents just ordered a pair of the Haven Power Wave 27.5 mid-drives from Mendham. They're $899 each before 25% coupon, so $675 after the discount. I'm really looking forward to checking those out.
12 days ago

Update, I would reconsider purchasing this bike. The two that my parents ordered arrived today I went over to check them out. Both of them could not be assembled due to major issues with the forks. One was completely welded crooked where the disc brake mount on the fork completely interfered with the rotor. The other bike had some caliper mount alignment issues that could be solved with some shims between the hub and the rotor, but the fork legs were spaced nearly 3/4" too narrow (81mm spacing as opposed to 100mm). Additionally, the description on the website says the batteries are UL tested, but that is not true. There are no UL markings anywhere on the bike or battery. With all the lithium battery fires, I would be a bit weary about these bikes. My dad is likely going to send them back. I hope they will provide him return labels without charging. The boxes were in rough shape when they arrived, too. Maybe you'll have better luck, but I wouldn't expect much. Usually, if something seems like too good of a deal, it probably is.
Not sure if it always comes with certified label. But found this on google when checking if haven ebikes are ul certified?. Its 250 Watt, 36V Mid-Drive Bafang motor will provide an extra power boost with higher-effort pedaling, thanks to its intelligent drive unit. The next-generation battery with Samsung cells and charger are both UL Certified for added safety
Last edited by acbharath14 December 27, 2024 at 11:21 PM.
1
Dec 28, 2024 7:31 AM
329 Comments
Joined Apr 2009
JoeysevenDec 28, 2024 7:31 AM
329 Comments
Buyer beware.
I just want them to ship my bike I ordered about 2 weeks ago.
Dec 28, 2024 1:03 PM
247 Comments
Joined Dec 2007
nilusprotocolDec 28, 2024 1:03 PM
247 Comments
The parts for some Haven bikes are listed on univega's website, a Kent company, and the phone number in the manual is the same phone number as Van Dessel Sports. 1-973-543-2599

Not sure what that all amounts to but if I had to guess these Haven bikes are a brand that never took off by the same owner/investor and now they are clearing them out. All a guess though, I have no inside knowledge just some Googling.

I'll have to wait and see if I get something with good quality control and lucky shipping or a headache.

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Dec 28, 2024 4:19 PM
195 Comments
Joined Mar 2015
MartogDec 28, 2024 4:19 PM
195 Comments
The report about misaligned welding on the forks is a bit concerning as there's not much that can be done to correct that besides replacing the fork.

Mendham is being cagey in their description regarding UL status. They state "Passed UL Testing" in their product specs - not that it is UL certified. That could mean that they themselves conducted testing that they think meets the UL criteria. It costs extra money to get an official UL certification of course.

Another sketchy thing that some Chinese sellers are doing is claiming a battery as UL listed when just the cells are listed and not the assembled battery itself. So Samsung may have paid to have their cell certified but the pack builder didn't pay get their assembled battery certified.


As for why they're dumping these bikes, who knows for sure… but I suspect these are excess builds from the post covid production surge that got built before demand dropped and left most builders with excess product.

Some other thoughts (highly speculative):
They may not be officially UL certified which is required in certain jurisdictions.

The drive system is several generations back from Bafang's current models. This is also built to a weird spec. It is configured with a class 1 speed limit of 20mph when most city bikes are now configured as class 3 at 28mph. That limits their appeal in the US market.

And because the M400 drive system is older, it may allow user customizations that run afoul of EU and other country's regulations. Bafang has locked down their newer generations of motors to prevent user changes in order to comply with newer regs. So these M400 systems may have limits on where they can be sold. They may meet the EU spec on speed limits but not meet current EU regs for other reasons.

But like I said, this is a lot of speculation on my part…


I'm fully prepared to go the credit card chargeback route if Mendham doesn't deliver, or if they deliver damaged, unusable, or out-of-spec bikes, and they refuse to make things right. I'm going into this deal with eyes wide open and I'm prepared to be disappointed!

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