CalcResult

Target Archery Equipment Reference

Fletch Sizes

Length

Name

Imperial

Metric

EP-161 ¾"44.5mm
EP-232 ⅜"60.3mm
EP-262 ⅞"73mm
EP-403 ⅞"98.4mm
EP-504 ¾"121mm

Taper-Fit Nock Sizes

Outside Diameter

Spine

Imperial

Metric

Nock Size

23xx23/64"9.1mm11/32"
22xx11/32"8.7mm11/32"
21xx21/64"8.3mm5/16"
20xx5/16"7.9mm5/16"
19xx19/64"7.5mm9/32"
18xx9/32"7.1mm9/32"
17xx17/64"6.7mm 1/4"
16xx1/4"6.35mm1/4"
15xx15/64"5.95mm7/32"
14xx7/32"5.6mm7/32"

Approximate Arrow Length Chart

Arrow LengthBow Length
14-1848"
18-2054"
20-2258"
22-2462"
24-2664"
26-2866"
28-3068"
30+70"

Typical Bracing Heights

Outside Diameter

Bow Length

Colour Code

Min Bracing Height

Max Bracing Height

70"Green8.5" / 216 mm9.75" / 248 mm
68"Red8.25" / 210 mm9.5" / 241 mm
66" Blue8" / 203 mm9.25" / 235 mm
64"Pink7.75" / 197 mm9" / 229 mm
54"Yellow6.5" / 165 mm7.25" / 184 mm

Standard Size Reference

ItemSize
Sight-block mounting screws10-24 x ¾" long (3/16" Diameter Coarse thread)
Pressure Button / Arrow-rest mounting bolt.5/16" -24
Pressure Button grub screwsM3 x3 (5mm max)

Arrow Spine Chart

Aluminium Arrow DesignationApproximate Spine
(small = stiff)
12142.5
14132.0
14161.7
15141.4
15161.4
16141.15
16161.08
17131.04
17140.96
17160.88
18130.87
18140.80
18160.76
19130.73
19140.66
19160.62
20130.61
20140.58
20160.53
21140.51
21150.46
22120.505
22130.46
22140.425
23120.42
23140.39
24120.40
24130.365
25110.348
25120.321
26120.285
26130.265
27120.260