HEADSET + SEATPOST CLAMP
2026 Sparky Frame
MSRP above includes 10% Tariff Surcharge
Shipping Times and Information
Garage Sale Items ship in 10 business days.
Small Parts and Goods ship ASAP.
All other in stock frames and complete builds ship within 8 weeks of their order date.
CLICK HERE for more information about shipping and leadtimes.
Shop Locally
CLICK HERE to find an Esker Retail Partner near you!
1,000,000 Mile Warranty
CLICK HERE for information about Esker's 1,000,000 mile warranty
UPGRADE OPTIONS
| | Gniess Components Headset and Seatpost Clamp *Color Matched* |
| FORK | Rockshox PSYLO Gold: 140mm travel // 44mm offset - Black Rockshox PIKE Ultimate: 140mm travel // 44mm offset - Black |
| COCKPIT | PNW Alloy - w/Dropper Post:
PNW Loam Carbon - w/Dropper Post:
|
| WHEELSET + TIRES | Esker Cycles House Wheelset: Alloy Rim // 30mm inner // 6 bolt // 27POE - Black Industry Nine 1/1 Enduro S: Alloy Rim // 30.5mm inner // 6 bolt // 90POE - Black BERD HAWK27 w/Talon Hubs: Carbon Rim // 27mm inner // Centerlock // 54T Ratchet - Black BERD HAWK30 w/Talon Hubs: Carbon Rim // 30mm inner // Centerlock // 54T Ratchet - Black *Wheelsets include Maxxis Rekon EXO - 29x2.6" Tires front and rear along with tubeless tape, valves, and sealant* |
GEOMETRY
| S1/SM | S2/MD | S3/LG | S4/XL | |
| Effective TT Length | - | - | - | - |
| Reach | 425 | 455 | 480 | 505 |
| Stack | 600 | 617 | 637 | 656 |
| HT Angle | 65 | 65 | 65 | 65 |
| HT Length | 91 | 110 | 132 | 153 |
| Effective ST Angle | 76 | 76 | 76 | 76 |
| ST Length | 375 | 410 | 440 | 475 |
| Max Seat Tube Insertion | 255 | 240 | 270 | 305 |
| Chainstay Length - Adjustable | 435-449 | 435-449 | 435-449 | 435-449 |
| Fork Offset | 44 | 44 | 44 | 44 |
| Fork Length | 512 | 512 | 512 | 512 |
| BB Drop Wheelbase - Forward Position | 60 1155 | 60 1194 | 60 1228 | 60 1262 |
| Stem Length | 50 | 50 | 50 | 50 |
| Estimated Rider Height | 5'3"-5'7" | 5'6"-5'10" | 5'9"-6'1" | 6'0"-6'4" |
Hardtail geometry shown at 30% fork sag
Between Sizes? Check out the FAQ below for more information to help you choose whats right for you.
Curious about fork travel? Frames are approved for forks within +/- 10mm of their original design.
Want more information on the chainstay length and Portage Dropouts? Check out our Portage Dropout Page
Looking for Standover Height? - Check out our thoughts HERE
FRAME SPECS
| Frame Material | Custom seamless, quadruple-butted, tapered, Drawn Over Mandrel, size-specific, ED Coated, 4130 Chromoly |
| Frame Weight | X,XXX grams for Medium - Weight includes dropouts, UDH, axle, seat collar, and cable guides |
| Recomended Fork Travel | 140mm suspension fork at 30% sag (495mm A-C) - Forks within +/- 10mm approved |
| Headset Specs | ZS44 upper // EC44 lower |
| Rear Dropout | Esker Portage Dropout - Adjustable - UDH // 148mm Hub Spacing // M12 x 1.0 x 180mm Axle |
| Tire Clearance | Designed around 29x2.6" Accommodates up to 29x2.8" *Clearance may vary based on your drivetrain choice (Chainline), rim width, actual tire measurement, and dropout position* |
| Seatpost Specs | 34.9 clamp, 31.6 post, internally routed |
| Bottom Bracket | Threaded 73mm BSA |
| Chainring Specs | Maximum = 34t round / 32t oval 52mm or 55mm Chainline |
SPARKY FAQ
- Q - What size frame should I buy?
Q - How many water bottles will the Sparky carry?
- SM = 1 bottle in the front traingle, 1 bottle under the down tube
- MD/LG/XL = 2 bottles in the front traingle, 1 bottle under the down tube
Q - Can I put a rear rack on the Sparky?
- Sure Thing! You can utilize a rear rack by installing our Portage Rack Mount Bolts and a Seatpost Clamp with Rack Mounts.
Q - Can I single-speed the Sparky?
- You betcha! Our Portage Dropout System allows you to adjust the chainstay length by up to 14mm, allowing you to run a single speed setup reliably, quietly, and with ease. Heck, we even have a single speed build option that you can buy!
Q - Can I run an internally geared hub on the Sparky?
- Technically, yes, but we recommend working with your favorite professional mechanic to figure out which hubs and support parts may be needed. Have fun!
Q - How does the Portage Dropout System work?
- The Portage Dropout System attaches to our hardtail frames and allows you to adjust chainstay length (for ride characteristics or tire width clearances), chain tension (for single speed application), or different hanger types (UDH or Classic).
Q - Do you do custom builds?
- We do not. We offer a limited menu of upgrade options for all of our bikes, but we do not do custom builds.
- If you'd like to have a custom Esker built up, please reach out to one of our Retail Partners and they'll work with you on getting you exactly what you want!
Q - Do your steel frames ride different than your Titanium frames?
- Yes and No. Based on our own riding input, as well as a ton of great input and feedback from our customers, find that our steel frames have a very similar feel when it comes to compliance on the trail in comparison with our Titanium frames. The biggest difference that most individuals feel is the weight savings of Titanium. Our Titanium frames are around 650-900grams lighter than their steel counterparts. This weight savings results in a 'snappier' and more 'lively' riding characteristics when on the trail.
Q - Do I need to 'Frame-Saver' your steel frames after I buy one?
- NOPE! We treat all of our steel frames with an Electrophoretic Deposition (ED) coating inside and out prior to painting them for rust protection.
Q - What does your warranty look like?
Q - Can I order one of your frames/bikes through a local bike shop?
- Absolutely. That would be the best way to order one of our frames/bikes! Working with your local bike shop allows you to get great insight on which model is right for you, which size may work best for your intended use, and ensure that your bike gets built up and fit to your exact specifications. Jump on over to our Dealer Locator to see a full map of our retail partners and find the one closest to you.
Q - Can I demo a bike before I buy it?
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Q - I want to buy a frame bag before my bike/frame arrives to me, can you provide the frame bag dimensions?
- We don't recommend buying a frame bag until you have your frame/bike on hand. That is absolute best way to ensure you get the right size and shape for your bike.
- If you're looking to make a custom bag(s) for your Esker, we've partnered with some incredible custom frame bag makers that all have our frame dimensions and files on hand. Please reach out to one of them HERE.
BUILT FOR THE BACKCOUNTRY
We here at Esker enjoy long rides into the wild spaces and are proud to say our bikes are truly Built for the Backcountry. That means they are designed and built on three values:
REFINED GEOMETRY:
DURABILITY:
We build our bicycles with the highest quality metal tubing for the utmost in durability.
Each tubeset provides a greater strength to weight ratio than other frames on the market and engineered specifically for its application. Every Esker frame is tested to our own internal standard far exceeding ISO 4210, for a true lifetime of constant use.
Esker will get you into the backcountry as far as you want to go, but it will also get you back!
RIDE QUALITY:
Not too flexy, not too stiff…but just right! We are riders, and design our bikes by riding them, constantly, to refine the perfect feel.
We toil over every model to ensure the ride simply feels right and comfortable, like your favorite hoody.