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Compare Disc Golf Discs

Pick two or more discs and see exactly how they differ - flight, feel, distance, and price, side by side.

Build your comparison2 of 4 discs · ready
KastaplastJärnMidrange4.5/3/0/3
Birdie Disc Golf SupplyUltraMidrange5/3/0/3

Järn vs Ultra

How Järn and Ultra compare on flight numbers, feel, distance, and price.

Key differences

SpeedJärn 4.5 vs Ultra 5Height1.8 vs 1.6 cm (+0.2)Rim width1.3 vs 1.5 cm (-0.2)

Flight Paths

Overhead view · right-hand backhand

0100200300400500Distance (ft)Fade / Turn
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Tap a disc to show or hide its path. Estimated from flight numbers.

KastaplastJärnMidrange
Birdie Disc Golf SupplyUltraMidrange
Flight Numbers
SpeedRim & velocity
Järn
4.5
Ultra
5
GlideStays aloft
Järn
3
Ultra
3
TurnHigh-speed bend
Järn
0
Ultra
0
FadeLow-speed hook
Järn
3
Ultra
3
Specifications
Spec
Kastaplast
Järn
Birdie Disc Golf Supply
Ultra
Flight rating≠
4.5/3/0/3
5/3/0/3
Stability
Very overstable (+3)
Very overstable (+3)
Beginner score≠
42/100
40/100
Est. carry≠
264 ft
274 ft
Type
Midrange
Midrange
Recommended skill
Intermediate, Advanced
Intermediate, Advanced
Diameter≠
21.3 cm
21.4 cm
Height≠
1.8 cm
1.6 cm
Rim depth≠
1.4 cm
1.2 cm
Rim width≠
1.3 cm
1.5 cm
Max weight≠
176 g
174 g
Bead
Beadless
Beadless
Plastics
0
0
PDGA Approved
No
No
On Amazon
Not on Amazon
Not on Amazon
Price from
Not listed
Not listed
The Verdict

Järn or Ultra?

Main difference: speed (Järn 4.5 vs Ultra 5). The Ultra has a higher distance ceiling but needs more arm speed; the Järn is easier to control.

Järn: Very overstableUltra: Very overstable
Where to buy
Järn
See retailer
Buy atAffiliate link
Ultra
See retailer
Buy atAffiliate link

We earn a commission on purchases through these links, at no cost to you. Affiliate disclosure.

FAQ

Is the Järn or Ultra more overstable?

They are equally stable (both +3) - turn 0/0, fade 3/3.

Should a beginner pick the Järn or Ultra?

A beginner is better off with the Järn (beginner score 42/100 vs 40/100) - lower speed and more turn make it easier to control.

What is the difference between the Järn and Ultra?

Main difference: speed (Järn 4.5 vs Ultra 5). The Ultra has a higher distance ceiling but needs more arm speed; the Järn is easier to control.

View each disc

Kastaplast Järn
Kastaplast
Järn
4.5 / 3 / 0 / 3
View disc →
Birdie Disc Golf Supply Ultra
Birdie Disc Golf Supply
Ultra
5 / 3 / 0 / 3
View disc →
Kastaplast Järn vs Birdie Disc Golf Supply Ultra: Flight Num