The 41Thermal fork guide

Forks spread final(l to r) Odyssey R32 in Vapour Blue, Odyssey R25 in Midnight Blue, Odyssey F25 in Black, Sunday Octave in Black, Odyssey Race CS2 in Black.
Forks final

It’s difficult to find a good argument for not taking a good look at 41thermal forks. This heat treating process revolutionized fork design and was pioneered by Odyssey. There’s now over a decade of experience in the current range of 41thermal forks. All of this is backed by a genuine lifetime warranty for the original owner.

Why anyone would buy a product like forks from a brand with no history and (most likely) no future is anyone’s guess. Forks are not a product that anyone wants to fail.

All 41Thermal forks come with following features;

  • One piece chromoly steerer
  • Integrated headset race
  • CNC 7075 Pre-load bolt
  • 4mm thick drop outs
  • Clearance for 2.4″ tyres

When choosing which 41Thermal there’s a few easy steps to narrow your choices;

  • Do you run a front brake? If so, you need the F25 fork (or Freestyle fork if you prefer 32mm offset and a less tapered leg).
  • Do you want a 25mm offset? If so, you need the R25 fork. Offset is clearly illustrated when you see the difference between R32 and R25 dropouts in the picture above. R32 forks have a 32mm offset. This is probably the ‘classic’ BMX offset and is suitable for all types of riding, especially if it involves going fast. 25mm offset will quicken your steering and reduce your wheelbase slightly, therefore it’s more suitable for tech riding. Nose wheelie fiends will find 25mm makes it slightly easier to ‘pop’ the back end up but in turn your balance point is slightly lessened, so you’ll need quick reflexes.
  • Do you need maximum grind/guard clearance? If that’s the case you need the custom tapered legs of R32 or Sunday Octave forks.

If you don’t need any of the above then Classic Race forks are your choice. If by any chance you have a 14mm front hub you’ll need Dirt Forks, or a new front hub and some R32’s!

We have the following colourways available;

  • F25 – Black, or White
  • R25 – Black, White, Chrome, or Midnight Blue
  • R32 – Black, White, Chrome, Vapour Blue, Midnight Blue
  • Octave – Black, or Chrome
  • Race CS2 – Black, Teal, Kelly Green, White, Lavender, or Pomegranate


Odyssey A+ pre-built wheels

A+ final
A+ final detail

Odyssey’s A+ Wheel is as good as it gets as far as wheels go. Each wheel comes pre-built with Odyssey HGS spokes and Odyssey rims strips in it’s own box. These wheels feel stiff and light right out of that box. Quality.

Antigram Rear Hub

36-hole, 2014-T6 aluminum shell
14mm inbound axle
9-T Driver
Left or right hand drive
Compatible Hub Guard (Optional)

Antigram Front Hub

36-hole, 7075-T6 aluminum shell
17mm 7075-T6 aluminum female axle
3/8″ 4130 chromoly inbound axle bolts
Steel Helicoiled Threads
6903RS Sealed Cartridge Ball Bearing
Compatible Hub Guard (Optional)
255 grams (9oz)

Aerospace Rim

Precision welded joint
6000 series aluminum
34mm wide
23mm tall
380 ERD
450 grams (15.8oz)

Sunday! Motoross

Ross final Ross 2
The Motoross is Aaron Ross’ first new signature frame in almost 5 years. When Sunday! sat down with Aaron to discuss the design they asked him to start from scratch. After some debate he came back to us with 3 main requests.

The first was to focus on a more traditional look and a lower retail price. Next on the list was steepening the head tube angle for a more responsive and up-to-date steering feel. For his last request, Aaron asked us to make the lower headset bearing flush with the head tube when a fork with an integrated race is installed. Changing the head tube angle and making the bearing flush was easy. However, simplifying manufacturing while still maintaining the level of strength that Sunday is known for was a significant design challenge. To solve this problem Sunday! used custom drawn and butted tubing for both the top tube and down tube. Each tube has been uniquely dimensioned to handle the stresses that the front triangle has to cope with. The down tube also makes use of an eccentric internal butting shape at the head tube, which allows for a much thicker cross-section in the area where an external gusset would normally be. The end result is the exact frame that Aaron was looking for. Simple, reasonably priced, and responsive.

The Motoross comes in three colors. The first is Black Splatter, a base coat of black with hits of the Ocean Blue and bright yellow finishes from Aaron’s earlier Sundays. The next is Orange Soda, one of the most popular colors we’ve ever done, and the last is Cool Gray, a color that Aaron rode when he was growing up in Corpus Christi, Texas.


Slimmed down dropout shape with proven integrated chain tensioners.
Custom drawn and butted down tube. Internal butting is eccentric at the head tube for greater durability.
Custom drawn and butted top tube for increased overall strength.
Tapered chain stay.
Tapered seat stay.
Proven slim wishbone design.
Proven miter-cut top tube and seat stay junction for increased overall strength.
Black Magic rustproof coating.
Angled Vanishing Point removable brake hardware “disappears” when removed for brakeless riding.
Removable Sunday Slim seat clamp.
Post-weld machined Mid bottom bracket bearing seats for a precision fit and ease of installation.
Post-weld machined integrated head tube bearing seats for a precision fit and ease of installation.
Flush lower head tube bearing seat for forks with integrated races.
Post-weld heat-treated throughout.
Lifetime warranty against manufacturing defects. 3-year limited frame damage warranty. Please check the warranty section of the Sunday website soon for more details

Geometry & Specs

Top Tube Lengths: 20.75″ & 21″
Head Tube Angle: 75°
Seat Tube Angle: 71°
Chainstay Length: 13.130″ slammed
Bottom Bracket Height: 11.5″
Standover (C-To-C): 8.5″