Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 6 - Jul 11
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
e bike fully fatbike KeystoneIntroducing the all new Keystone Electric Fat Tire Bike. Since 2013, Borealis has specialized in lightweight, high end fat bikes. The Keystone is our first ever Class I electric bike. The frame geometry is optimized for riding just about anything with clearance for up to 5 wide tires. Paired with the most technically advanced components in the industry, the Keystone sets the standard for premium quality Electric fat bikes. HIGHLIGHTS Color: Gunmetal
Introducing the all-new Keystone Electric Fat Tire Bike. Since 2013, Borealis has specialized in lightweight, high end fat bikes. The Keystone is our first ever Class I electric bike. The frame geometry is optimized for riding just about anything with clearance for up to 5” wide tires. Paired with the most technically advanced components in the industry, the Keystone sets the standard for premium quality Electric fat bikes.
HIGHLIGHTS
- Color: Gunmetal Grey with Cobalt Blue Graphics
- Weight: 56 lbs. as shown.
- Standard features include Shimano EP8 Drive Unit, Shimano 630Wh Battery, SRAM G2 RS brakes, Mastodon Pro EXT 120mm suspension fork, carbon handlebars, dropper seat post, durable Sun Ringle Mulefüt rims and your choice of tires.
- Frame geometry provides responsive handling, offering maximum control for varying conditions in snow or sand.
- Tire clearance up to 26x5” and 27.5x4.5”.
- Lightweight, 6000 series aluminum frame comes with internally routed cables, 1-2 bottle cage mounts and lizard skin protection.
- Keystone Frames are backed by our LIMITED LIFETIME WARRANTY.
ASSEMBLY
Some assembly required upon receipt. Your bike will be completely assembled and tuned by Borealis, then partially disassembled for shipment. The remaining assembly will require installation of the rear derailleur, chain, fork, seat post, wheels, and handlebars. A kit will be included with your order that has all the necessary tools assemble your bike, including a multi-tool, torque wrench, and shock pump. If you are not familiar with this level of assembly, we recommend having your local bike shop complete the assembly.
Stay tuned for our step-by-step assembly video.
WHEELS AND TIRES
- All bikes come standard with tubes.
- If you order rim tape with your Mulefut rims, we will tape the rims and install the tires with tubes.
- Tubes must be removed and tubeless valves installed for tubeless set up. We recommended to have this completed by a professional bicycle mechanic.
SIZE CHART
BUILD SPECS
| Frame | Borealis Keystone Aluminum 15", 17", 19", 21" |
| Drive Unit | Shimano DU-EP800 |
| Battery | Shimano BT-E8036 (630Wh) |
| Display | Shimano SC-EM800 |
| Assist Switch | Shimano SW-EM800L |
| Speed Sensor | Shimano EWSS300L540A |
| Fork | Manitou Mastodon PRO EXT 120mm, 51mm offset |
| Headset | FSA w/ Star Nut |
| Stem | Borealis 50mm |
| Handlebar | Borealis Carbon |
| Grips | Ergon GP1 |
| Saddle | WTB Volt Medium Steel |
| Seat Collar | Borealis Bolt-On |
| Seatpost | KS Lev Integra 125mm (SM, MD) / 150mm (LG, XL) |
| Brakes | SRAM G2 RS |
| Rotors | SRAM HS2 200mm front / 180mm rear |
| Shifter | SRAM AXS Pod Contoller Right Bridge w/ MMX Clamp for GX Eagle Transmission |
| Derailleur | SRAM GX Eagle Transmission Derailleur |
| Cassette | SRAM GX Eagle Transmission Cassette 10-52T |
| Chain | SRAM GX Eagle Transmission Flattop Chain |
| Crank Arms | Samox 170mm |
| Chainring Mount | Samox 104 BCD for 75mm chainline |
| Chainring | SRAM Eagle Transmission E-Bike MTB Chainring 104 BCD 36T Steel |
| Rims | Your choice of SunRingle Mulefüt SL - 26x80, 27.5x80, or 27.5x65 |
| Spokes | Straight Gauge 2.0 Black |
| Hubs | Borealis Gen 4 15x150 / 12x197 |
| Tires | Your choice. All tire options are listed online. |
| Included | Shimano ECE80042 Battery Charger, AXS Power Pack, Kickstand, UDH Hanger, Key for battery release, Borealis Rear Thru Axle, Remote Battery Charging Adapter |
| Weight | Size Medium w/ Mulefut 27.5x80 & Terrene Yippee Ki Yay 4.3" Tires: 56 lbs. |
FRAME SPECS
| Wheel / Tire Size | 26 x 3.8–5.0" on up to a 100mm rim / 27.5 x 2.8-4.5 on up to a 82mm rim / 29 x 2.25–3.0 |
| Susp Fork Travel | 120mm |
| Fork Offset | 51mm |
| Headset-Upper | IS41 |
| Headset-Lower | IS52 |
| Seatpost | ø31.6mm |
| Seat Collar | ø34.9mm |
| Dropper Compatible | Internal - 125mm for SM & MD / 150mm for LG & XL |
| Front Derailleur Type | Not Compatible |
| Bottom Bracket | Shimano EP8 |
| Crankset (Max Ring) | Chainline 75mm / 1x (38t) |
| Rear Brake (Rotor) | 74mm post (160–180mm) |
| Rear Spacing | 197 x 12mm thru-axle |
| Rear Axle | ø12 x 222L, TP= 1.0, TL = 16 |
| Derailleur Hanger | SRAM UDH |
| Bottle Mount | Small & Medium: 1 (downtube) / Large & XL: 2 (downtube & seatube) |
| Rear Rack Reccomendation | Old Man Mountain Divide Fat |
| Rear Rack Mounts, Upper | Yes |
| Axle to Crown | 531mm |
| Steerer Tube Size | 28.6mm |
| Steerer Style | Tapered |
| Crown Seat Diameter | 40mm |
GEOMETRY CHART
| Small 15" | Medium 17" | Large 19" | X-Large 21" | |
| Effective Top Tube | 630 | 645 | 660 | 665 |
| Seat Tube Center to Top | 381 | 432 | 482 | 533 |
| Head Tube Length | 160 | 160 | 175 | 190 |
| Head Tube Angle | 69° | 69° | 69° | 69° |
| Seat Tube Angle | 73° | 73° | 73° | 73° |
| Chainstay Length | 480 | 480 | 480 | 480 |
| BB Drop | 60 | 60 | 60 | 60 |
| Reach | 420 | 435 | 445 | 446 |
| Stack | 688 | 688 | 702 | 716 |
| Standover Height | varies based on wheel and tire size | |||
| Wheelbase | 1187 | 1207 | 1223 | 1229 |
| Fork Offset | 51 | 51 | 51 | 51 |
FAQ:
| Can I use the Keystone in cold temperatures? | It is okay to use your Keystone in the operating temperature range, suggest by Shimano: -10 - 50°C |
| How do I remove the battery? | Each Keystone will come with a set of keys. Make sure to save your spare key and safe location. Insert the key fully into the lock cylinder on the non drive side of the downtube until it stops. Rotate the key clockwise until the battery drops from the downtube providing access to the latch release mechanism. Use your index finger to gently depress the spring which will fully release the battery. Use caution to support the battery when removing it so it does not fall to the ground. |
| How can I file a warranty claim for the drive unit and other electronic components? | Contact an authorized Shimano STEPS dealer. |
| Can I change my motor/power settings? | Yes, you can customize your motor settings via the app as well as update the firmware. You'll need to download the Shimano E-tube mobile app. |
| Can I change the max speed? | No. Depending on where you've purchased your Keystone it will either have a max assist speed of 20mph or 25km/h. This setting cannot be modified by the user or a dealer. |
| Can I purchase an extra battery? | Yes, you can purchase a spare battery kit with a spare downtube cover directly from Borealis. Spare battery kits may not be available in all markets. You can also purchase a spare battery from Shimano, but it will not include a battery cover. |
| Can I ride the Keystone without the battery? | No. This will void your warranty with Shimano and cause damage to the motor system. |
| Do I need to update the firmware / software? | Firmware can be updated via the Shimano E-tube mobile app. |
| How do I use walk mode? | Hold the upper button (down assistance level) for 1 second until the display turns blue and displays WALK mode. Press and hold the same button to power the rear wheel. |
| How long does it take to charge the Shimano 630Wh Battery? | With the included EC-E8004 charger, the battery can fully charge in 6 hours. |
| How long will my battery last? | The remaining battery capacity is affected by temperature and cycle count. Generally, it decreases approximately 5% a year. This means roughly 95% capacity remains after 1 year, and 90% after 2 years. |
| How should I store my bike and or battery? | Charge your battery to approximately 70% before storing for long periods of time. Store in a cool, indoor location with a stable temperature between approximately 10 - 20 C / 50 - 70 F. No direct exposure to sunlight or rain. |
| Are the electronic components waterproof? | Yes, the STEPS system is waterproof as long as all components of the system, including the battery and battery cover, are installed correctly. We recommend not using a high-pressure washer to clean your Repeater, but riding in the rain and regular cleaning are okay. |
| My bike won't turn on, what do I do? | First, make sure all cables are plugged in, if they are then try removing and reinstalling the battery. If it still won't turn on try charging your bike for a few hours. If your bike is too hot or too cold, it might not turn on. If your bike still does not turn on, contact a Transition or Shimano dealer for support. |
| Should I only charge my battery when it's completely drained? | No, simply charge the battery any time you need it, frequent charges actually help battery longevity. Avoid letting the battery discharge completely. Charge to 70% before storing for long periods. |
| What are the different error codes and what do they mean? | Whenever you encounter an error code, first cycle the power off and then back on. If the code persists, remove the battery and then reinstall, which will hard reset the system. If neither of these steps resolves the issue, please reference the Shimano error code list. If you cannot resolve your error code via your Etube mobile app please visit your nearest Shimano STEPS dealer or contact Shimano STEPS customer support. |
| What is the range and how can I maximize it? | There are many factors that affect battery range, such as, how much effort the rider is providing, the gradient of terrain, ambient temperature, and rider weight. The best way to maximize your range it to spend more time in Eco and Trail modes, and minimize the amount of time spent in Boost mode. |
| What is the widest tire the Keystone can fit? | 26x5.0" or 27.5x4.5" |
| What kind of maintenance is needed on the drive unit and how often? | The drive unit is sealed and cannot be serviced. If there are any issues with the drive unit, it will need to be removed and sent back to Shimano for service or replacement. The drive unit along with the battery is designed to last over 1000 charge cycles. Assuming you're getting 30 miles (48Km) per charge, the drive unit should last 30,000 miles, or much longer than pretty much any other part on your bike. |
| Why does my bike stop giving assistance over a certain speed? | Depending on where you've purchased your Keystone it will either have a max assist speed of 20mph or 25km/h. This setting cannot be modified by the user or a dealer. |
| Will environmental temperature affect battery life? | The battery life will be shorter during cold temperatures, this is not a sign of a problem. |
| Will my bike be delivered with a charged battery? | Your Keystone was shipped in a "sleep" mode with the battery at approximately 30% charge. It is recommended to fully charge your battery before the first ride. |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 1337 reviews
Sort
Product Reviews
★★★★★ 5
Awesome for Cold Brew Coffee and Tea!
I love this pitcher! I make Cold Brew Coffee to have Ice Coffee in the mornings. I just used it this last weekend to make Cold Brew Iced Tea.Both taste great!!
It is a glass pitcher with a non-slip bottom. It came very well packaged, in a plastic bag that was wrapped in foam all the way around, and put into a cardboard box.
The filter seems very good quality. I put the grounds in it and the add water to the pitcher. I stir once in the middle of brewing in the fridge (recommended in the instructions). When it's done, I keep the lid on and just twist to turn it just off to the side of the spout, and it pours out just fine. (Doing it this way is also stated in the instructions. Doing it this way will definitely keep grounds out of your drink with NO problem! )
I really like this pitcher. It is super easy to clean. And I Brew it starting late morning/ afternoon, letting it sit over night, so it's ready in the morning. I expect it to last years, given the quality! But if my kids or husband ever broke it (since it is glass), I wouldn't hesitate to buy another!!
It is definitely a GREAT buy for the money!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 28, 2024
★★★★★ 4
Easy to use and clean, good quality, but..
I've used this a few times to make cold brew coffee at home and it works for that purpose. However I have found some downsides to doing it this way which I will discuss below. I like the base on this because it keeps the pitcher from sliding and protects the glass as well. The lid fits nicely and keeps the pitcher sealed. The mesh filter has worked so far for the course grinds required for cold brew and is very easy to empty and clean, especially with the removable bottom cap. However, going by the ratio as instructed by this product of grinds to water (and all that it can fit in the filter), it doesn't make a concentrate but an already diluted, ready to drink cold brew. Due to this, I'd prefer to have a larger capacity brewer so that my batch could last longer (as a concentrate would). You can still add some cream or ice or water if you'd like, but it isn't making a concentrate as if you were using a 1:4 or 1:6 ratio. However its slim design does make it convenient if you don't have much space to keep it in the fridge for as long as you'd like to be using it.
The downside I've found to making cold brew this way aside from the size to make the amount I'd prefer at a time for concentrate is..
There is not an easy, convenient way to squeeze the rest of your cold brew out of the grinds that have soaked it up. I use a tea towel or cheese cloth to squeeze it out after dumping them from the filter, but it is a bit messy and time consuming and I feel I still don't get it all. For this reason I would prefer doing cold brew with a French press.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 23, 2023
★★★★★ 5
STELLAR Customer Service!
I only used mine about 10 times, and then the top somehow got stuck. I'm not that strong, so I don't know how it happened. Now I can't get it off and it renders it useless. There are no instructions that say whether it tightens to the right or left, so I don't know which way to direct my efforts. It seems to just get tighter no matter the direction I work it.
UPDATE: The company immediately replied and offered to send me a new one, even though I bought it 2 years ago. This is excellent customer service!
This brewer really makes life easier. Just don't screw the lid on too tight. It makes great cold brew, ready in the fridge when you want it. It cleans up so easily too!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 19, 2025
★★★★★ 5
love this!
So far I’m loving this cold brew kit in most every way.
That said, I want to get the bad out of the way first: Even with careful attention to stirring the grounds my mesh filler was damaged within the first few brews. It’s just honestly disappointing because I love this kit to the fullest in every other way.
It fits perfectly in my refrigerator door.
The bumper at the bottom ring gives me peace of mind for protecting against the occasional bump.
The filter, even with its weaknesses is well thought out. My brew is about how I like it after ~24+ hours of steeping. It has a convenient removable cap on the bottom to help remove used coffee grounds (your compost or worm bin will thank you!!!)
The handle is comfortable and very convenient.
I love the lid. It fits very very nice and snug and the design is very well thought out. Being able to pour my coffee without performing a juggling act is a relief. A simple turn of the lid and, “voila!”
As a whole this cold brew maker is very attractive to use and store. It’s a mostly premium look and experience at what seems to be a competitive price at the time of my purchase. I will try to source glue to repair my filter and if that fails then look into a replacement from the company.
EDIT: I was confident the company would reach out to me to make things right with an offer to replace my filter with their updated model. Have not heard back as of yet. Would certainly change my review back to 5* if they made this right. A product should not fail so soon - especially with the special care & attention I’d given it.
EDIT2: Amanda and Justin were very quick to replace my filter once I found their email and messaged them my order number and explained my situation. 5 star product 5 star customer service.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 14, 2020
★★★★★ 5
Very good cold brewer.
This cold brew coffee maker is great. I was a little skeptical about it when I was shopping for one. But for such an inexpensive price and Amazon's great return policy, I would try it out. Well I'm glad I did!
Even before it got to me, the seller sent me an email with some suggestions on how to cold brew and a pdf attachment with some nice recipes. I also bought a can of Cafe Du monde coffee to use with it.
When it arrived, I went right in. I unboxed the brewer, and was really impressed with the quality of it. Very well made. The filter is strong and the removable rubber bottom of the carafe is a really good idea to make it non-slip.
I like my coffee strong, so I filled the filter with coffee to the top. Especially if you are going to add ice later to your drink, make it strong. When your filter is halfway filled with coffee, fill the carafe with water halfway as well. Mix the coffee in the filter a little bit. Then fill the filter to the top with coffee and then fill with water. Give it another couple stirs and place in the fridge. When carrying to the fridge make sure to hold the bottom of the carafe. The handle is not as strong when filled with water. Come back the next day and stir some more. Later that day, or even the next day, your coffee is ready to go.
I made Vietnamese coffee with mine. I put some sweetened condensed milk on the bottom of my glass ,with a splash of milk or half and half, then ice and cold coffee. AMAZING! Worth the wait. Not bitter, but not overly sweet either. Great taste with the cafe du monde coffee.
Go get yourself one of these and enjoy. I am going to try the pumpkin spice one, that is in the recipe book the seller emailed me next. Can't wait!!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 25, 2017