Question about Stamina Products Stamina Aero Pilates XP 55-556 Reformer

# Looking for replacement wheels for aeropilates machine

Wheels are 1 3/8" diameter and 1/2" wide i need a set of 4

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### Mountain Bike Wheelsize WTB and the Global Measuring System

I had to change my WTB Velociraptor 44 / 50 tyres last week due to age and wear but I didn't know what to replace them with, all knew was the inner tube that I had was marked as thin 26" x 1.5" / 2.2" so what does the 44 / 55 refer to ?

I knew that my rim was a 26" Mavic X138 quick release rim with a thin inner 16mm outer 20mm which I found was standardized by the following system

ISO System ( aka E.T.R.T.O.)
----------------------------------

The ISO system uses two numbers for example 55 - 622

1. The first is the rim width is the inner width measured between the flanges as shown in the diagram so this would be 55mm, this is a wide rim most WTB are 20mm and narrow to save on weight
2. The second ISO number is the critical one, it is the diameter of the bead seat of the rim, in mm ("B.S.D.") in this case 622m or a 29" wheel, note this is not a straight conversion 520mm is only20.5"" this is because its the Bead Diameter not the total Diameter in this case would be 736mm

---------------Figure 1

29" x 55/50 aka (55 622) on the wall of the a WTB Tyre this is what is means

1. The 29 is the size in inches of the wheel
2. The second set of numbers 55/50 is called the Global Measuring
System
by WTB describes the tread size at 60psi
3. The third set is the Tire Size Designation is the Tire Section Width or the outside width of the tire casing in this case 55mm, not the rim size which might be as narrow as 21mm
4. The second number is the Tire Bead Diameter in this example is 662 mm, this is not the full Diameter of the Wheel

26" X 44 / 50 is my WTB Velociraptor this is all I had to go on I knew it was a mid-range tyre due to the treads

1. The 26" is the BSD size in inches of the wheel ( 599mm )
2. The second set of numbers is called the Global Measuring
System by WTB which will take up to a 1.9" inner tube with a deep tread.

GMS ------------> TRADITIONAL 26" DIAMETER x WIDTH in INCHES

-- / -- ---------------> 26" x 1.5 " --- slicks or road tyres
-- / -- ---------------> 26" x 1.75 "
44 / 50 ------------> 26" x 1.9 " ---- WTB Velociraptor
47 / 50 ------------> 26" x 1.9.5"
47 / 52 ------------> 26" x 2.1 "
49 / 52 ------------> 26" x 2.14"
52 / 54 ------------> 26" x 2.24" ---- WTB Motoraptor
50 / 55 ------------> 26" x 2.3" ---- WTB Exiwolf
55 / 52 ------------> 26" x 2.4"
55 / 62 ------------> 26" x 2.5"
58 / 55 ------------> 26" x 2.55" ---largest tread chunky knobbly or ballon tyre

NOTE:

It is also worth adding that if you own a Bike Computer you will need to input the Wheel Size (WS) this is also the circumference in mm this can be calculated using 22/7 (approximation of Pi) x the Diameter, where the diameter of a fully inflated MTB tyre is the full 26', taking 1' = 25.4mm

26' = 660.4mm

660.4mm x 22 /7 = 2075mm

on May 14, 2010 | Cycling

3 Answers

### What is the difference between tire size 255/70 and 265/70

Hello Projocs03,

Tires are typically measured tire width (sidewall)/tire ride height/wheel size. The differences of the two tire sizes you published are .4 of an inch difference in width/sidewall. And about .55 in over all diameter which would impact you revs per rotation. Depending on your wheel size.

Attached is a comparison of the two given the variable of 17" rim.

Stock Tire >Search Tires Tire 1 - 255/70R17 >Search Tires Tire 2 - 265/70R17 >Search Tires Section Width: - - Section Width: 10.03 in 255 mm Section Width: 10.43 in 265 mm Rim Diameter: - - Rim Diameter: 17 in 431.8 mm Rim Diameter: 17 in 431.8 mm Rim Width Range:
Rim Width Range: 6.5 - 8.5 in Rim Width Range: 7 - 9 in Overall Diameter: - - Overall Diameter: 31.05 in 788.67 mm Overall Diameter: 31.60 in 802.64 mm Sidewall Height: - - Sidewall Height: 7.02 in 178.30 mm Sidewall Height: 7.30 in 185.42 mm Radius: - - Radius: 15.52 in 394.20 mm Radius: 15.80 in 401.32 mm Circumference: - - Circumference: 97.54 in 2477.5 mm Circumference: 99.27 in 2521.4 mm Revs per Mile: - Revs per Mile: 669.8 Revs per Mile: 658.2* Source http://www.1010tires.com/TireSizeCalculator.asp?action=submit

I added the above link so you can research further or change any variables you need to know. However, the most important thing to understand is the impact of your speedometer. Different sizes will have different impacts. For example going to a bigger tire will show a slower speed on your spedo that your traveling.

Good luck

May 25, 2011 | 1997 Ford Expedition

1 Answer

### More RPM Issues for Tools 1) Have old jointer with motor..1725rpm 5 1/2" pulley.. pulley on jointer is 2 1/2" ..what is 4" jointer blade speed ? also looking for right speed for 4" jointer.. 2)...

I had the same problem a while back, But I didn't bother with exact speed, what I cared more about was power and speed, and not bogging down. And I had it running smooth. Of course I have no idea what the pulley diameters were, but it sounds like you should be real close with the 2 1/2 inch at the head and 5 1/2 inch at the motor spinning 1725, should be about 900? So to get 700, bring the 5 1/2 down to 4 1/2, see if it has enough speed/power.

Feb 13, 2010 | Air Tools & Compressors

1 Answer

### 97 fxdl, difference between narrow/wide glide componants

You need the complete front end including the wheel. The FXDWG is somewhat of an oddball in that a lot of parts fit only that bike. A lot of other parts will not fit a Wide Glide. This even applies to the exhaust system.

Measure the diameter of your upper fork tubes, they're 39 mm tubes. The Wide Glide uses 41 mm tubes. The Wide Glide also uses a 21" front wheel.

Nov 08, 2009 | Harley Davidson FXDL Dyna Low Rider...

1 Answer

### I need the dimentions for a 95 swift rim... the inside diameter hole i already know it is a 13in 4x4.5

You've just about stated all the numbers that you can ever possibly need! Yes, the standard 13" wheel is 4.5" wide, has 4 stud holes intended for 12mm studs which are on a pitch circle diameter (PCD) of 114.3mm (the Japanese version of 4.5"). The only thing you haven't mentioned is the offset of the rim. This is the distance from the mounting hub face of the wheel to where the middle of the wheel is (halfway between the outer and inner rim edges. For a front wheel drive car, this number is usually always positive and I think it is 35 or 45mm for this wheel. If you have an original steel wheel, it should be stamped on the outer rim area near the valve (along with other identifying info).

Oct 07, 2009 | 1995 Suzuki Swift

2 Answers

### Front wheel swap with what???

90 to 99 FL Softail should all be compatible except FL Springers.

Jun 25, 2009 | 2005 Harley Davidson FLSTF - FLSTFI Fat...

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### Bicycle Tires Tube

look at the side of the tire for a series of numbers

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