What is "I" scale?

In the Walther’s FLyer catalogs mailed out monthly, amidst things in G, O, HO, N an Z scales, there seems to be this mysterious “I” scale. Seems to be made mostly by Marklin.

Anybody have any idea what size/scale “I” is?

At $729.99 for a Duetche Bahn passenger car {page 30, Walther’s Flyer catalog, December 2008 L column, 4th item down}, I better be able to ride the thing!

Just a guess, I think it stands for #1 gauge equipment.

Don Z.

I think it is called 1 gauge or gauge 1. It’s 1:32 meaning if you enlarged it 32 times it would be the size of an actual RR car. It’s 3 times the size of HO gage. It might also be considered Large Scale. There is also 2 gauge & 3 gauge. I am not 100% sure about the above.

Name of Scale Inches Millimeters Scale
Standard 2 1/8" 53mm
#1 - G 1 3/4" 45mm 1/32 - 1/29 (Narrow: 1/20.3, 1/22.5, 1/24)
O* 1 1/4" 31.8mm 1/48 (1/43.5 in UK)
S 7/8" 22.2mm 1/64
OO (US) 3/4" 19mm 1/76
HO 5/8" 16.5mm 1/87.1
TT 15/32" 12mm 1/120 (US)
N (OOO) 3/8" 9mm 1/160
Z 1/4" 6.52mm 1/220
O-3/16 **(O27) 1 1/4" 31.8mm 1/64
  • Obviously, in 1/48, real-life gauge would be 5 foot. That anomaly is overlooked by most O gaugers

** The original O27 scale trains were 1/64 scale models running on O tricks and track.

Indeed, I or 1 is referring to Gauge 1: 1/32 scale on 45mm track

It is it NOT the same as G scale: 1/22.5 scale on 45mm track

Gauge 1 is correct standard gauge trains represented on scale 4’-8-1/2" gauge using 45mm gauge track.

G Scale is correct when representing narrow gauge Meter gauge trains (approx. 3’-3") on Meter gauge track using the same 45mm gauge track

Gauge 1 track and G scale track while being the same gauge are often differentiated by different sized tie strips, standard gauge having smaller sized tie strips, and narrow gauge having larger ties accordingly.

The scale and gauge cunnundrum is one of the most confusicating things to learn about large scale. but just as N and HOn30, and HO and On30 both run on the same gauge track, they are very different scales.

Interesting I always thought I scale was:

I built this structure

I built this engine from a kit

I built this layout

I built this passenger car…

[(-D][;)][:o)][8]

MTH makes Gauge 1 trains for less than Marklin. http://www.railking1gauge.com/

Enjoy

Paul