Wheelbase

This box is mandatory for all BullAnt products. The wheelbase is the distance from the centre of one axle to the centre of the next. You should simply type a number in this box corresponding to the desired wheelbase, acurate to the nearest 0.25mm or .01". You can enter the wheelbase in metric form as eg: 22.5 or in inches as .886"

If you have chosen a BullAnt with more than two axles, type the first axle to axle distance, then a + symbol and then the next distance, and so on.

The axles can be at different spacings if you wish, but please make sure the wheel sizes do not cause an overlap. The BullAnt gear box will be at the start of the specification, so if you typed 20 + 30 + 40, then the gearbox will automatically be placed at the 20 end.

The minimum practical wheelbase is 17mm, although the design of the BullAnt allows for an absolute minimum wheelbase of 11.5mm. If you specify a wheelbase less than 17mm, the sideframe mount bolster may not be fitted nor will pickups be fitted. The pickups will be packed in the box with the BullAnt however, so you can arrange to fit them yourself.

The table below shows some popular wheelbases in feet and inches equated to the scale size in millimetres. Conversions are shown for 4 of the popular scales. The resultant wheelbases have been taken to the nearest 1/4 millimetre as this is the accuracy we work to.

Wheelbase
S Scale 1:64
OO Scale 1:76
HO Scale 1:87
TT Scale 1:120
3' 6"
16.5mm
14mm
12.25mm
NA
3' 9"
18mm
15mm
13mm
NA
4' 0"
19mm
16mm
14mm
NA
4' 3"
20.25mm
15mm
15mm
NA
4' 6"
21.5mm
18mm
15.75mm
11.5mm
4' 9"
22.5mm
19mm
16.5mm
12mm
5' 0"
23.75mm
20mm
17.5mm
12.75mm
5' 3"
25mm
21mm
18.25mm
13.25mm
5' 6"
26mm
22mm
19.25mm
14mm
5' 9"
27.25mm
23mm
20mm
14.5mm
6' 0"
28.5mm
24mm
21mm
15.25mm
6' 3"
29.75mm
25mm
22mm
16mm
6' 6"
31mm
26mm
22.75mm
16.5mm
6' 9"
32mm
27mm
23.5mm
17mm
7' 0"
33.25mm
28mm
24.5mm
17.75mm
7' 3"
34.5mm
29mm
25.25mm
18.5mm
7' 6"
35.75mm
30mm
26.25mm
19mm
7' 9"
37mm
31mm
27mm
19.5mm
8' 0"
38mm
32mm
28mm
20.25mm
8' 3"
39.25mm
33mm
28.75mm
21mm
8' 6"
40.5mm
34mm
29.75mm
21.5mm
8' 9"
41.5mm
35mm
30.5mm
22.25mm
9' 0"
43mm
36mm
31.5mm
23mm
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