The bmxultra.com BMX Gear Calculator iPhone/iPad App has now been updated and we’ve added in a couple of handy new features.

If you already own it update now! If you haven’t checked it out yet, make sure you do.

Version 1.5 updates include

• added more brands and tires
• added custom option for tires that are not listed
• added application state restoration (remembers your last selections)
• converted to iOS 7 look
• minor changes

Tires now included

Tioga

PowerBlock 20×1.75
PowerBlock 20×1.60
PowerBlock 20×1.40
PowerBlock 20×1.95
PowerBlock 20×1 3/8
PowerBlock 20×1 1/8
PowerBlock 24×1.40
PowerBlock 24×1.60
PowerBlock 24×1.75
PowerBlock 24×2.1
Comp 3 20×1.75
Comp 3 20×1.50
Comp 3 20×1 3/8
Comp 3 20×1 1/8
Comp 3 24×1.75
Comp 3 25th 20×1.75

ITS

Micro Knobby MK2 20×1.75
Micro Knobby MK2 20×1.50
Micro Knobby MK2 20×1 3/8
Micro Knobby MK2 20×1 1/8
Micro Knobby MK2 20×1
Micro Knobby MK2 24×1.75
Micro Knobby MK2 24×1.50
Micro Knobby MK2 24×1 3/8
Micro Knobby MK2 24×1 1/8
Micro Knobby MK2 24×1

Maxxis

DTH 20×1 1/8
DTH 20×1 3/8
DTH 20×1.75
DTH 20×1.5
DTH 24×1.75
Torch 20×1.75
Torch 20×1.5
Holy Roller 20×1.75
Holy Roller 20×1 3/8
Holy Roller 20×1 1/8
Holy Roller 24×1.85

Alienation

TCS R1 20×1.60
TCS F1 20×1.95
Differential 20×1.75
Graffiti TCS 20×1.85

Kenda

Konversion 20×1.75
Konversion 20×1.65
Konversion 20×1.50
Konversion 24×1.75
Konversion 24×1.50
Kompact Folding 20×1.75
Kontact Folding 20×1.75

VeeRubber

Speedster 20×1 3/8
Speedster 20×1 1/8
Speedster 20×1.50
Speedster 20×1.6
Speedster 20×1.75
MK3 Foldable 20×1
MK3 Foldable 20×1 1/8
MK3 Foldable 20×1 3/8
MK3 Foldable 20×1.50
MK3 Foldable 20×1.75
MK3 Foldable 24×1
MK3 Foldable 24×1 1/8
MK3 Foldable 24×1 3/8
MK3 Foldable 24×1.50
MK3 Foldable 24×1.75
MK3 Foldable 24×1.85

IRC

Siren 20×1 1/8
Siren 20×1 3/8
Siren 20×1.50
Siren 20×1.75
Siren 24×1.75

Arisun

XLR8 Foldable 20×1.50
XLR8 Foldable 20×1.75
XLR8 Foldable 20×1.95
XLR8 20×1 1/8
XLR8 20×1 3/8
XLR8 20×1.50
XLR8 20×1.75
XLR8 20×1.95
XLR8 24×1.75

And if your specific tire is not listed you have two options

Generic sizes

16×1.75
18×1.75
20×1 1/8
20×1 3/8
20×1.50
20×1.75
24×1 1/8
24×1 3/8
24×1.75

Custom

Measure up the outer diameter of your rear wheel and work out your rollout

https://itunes.apple.com/us/app/bmx-gear-calculator/id665859954?mt=8