The right size: 72" or 74" bow ?

Download information guide.

Grouping

A longer bow improves lateral stability and grouping.

Comfort

A wider string angle gives better hook consistency.

Smoothness

Longer bows are smoother for a longer draw length.

Adapting bow size to your drawlength

Bow size is linked to your AMO draw length*. 66" to 70" bows for archers having a draw length in the range 27" to 29".

If your draw length is 30", 31" or more, a 72" or a 74" bow will give you better results.

Carbon Monolith HM

Thanks to our unique Carbon Monolith HM technology, providing unmatched torsion stiffness and lateral stability, it has made it possible to design XL limbs without sacrifying lateral stability or speed.

AMO drawlength* 27" 28" 29" 30" 31"
Bow 66" 68" 70" 72" 74"
Riser 25" 25" 25" 27" 27"
Limbs 66" 68" 70" 70" 72" **

* AMO draw length = distance nock to plunger +1.75".

** 72" limbs are only available for Vx+ model.



Advice for Uukha products choice and use


Limbs size choice

72": draw length of 31" AMO (American Manufacturer Organisation) and more
70": draw length of 29" and 30" AMO
68": draw length of 28" AMO
66": draw length of 27" AMO and less
(the draw length AMO is the distance in inches between the nock and the Pressure button + 1,75")

Poundage choice

Each pair of limbs is weighed with the median adjustment of the tiller screws. The corresponding power is marked on the limbs.
Use our calculator to evaluate the poundage at your draw length:

Brace height

We recommend to respect the value in a +-10mm range.

Lower the brace height if you focus on speed, increase it for stability and comfort.

Bow 74" 72" 70" 68" 66" 64" 62" 60" 58"
Brace height +-10mm 239 mm 232 mm 225 mm 218 mm 211 mm 205 mm 198 mm 192 mm 186 mm
Tiller

Tiller is the difference between the distance top limbs / string and the distance bottom limb string.

For Uukha limbs common settings between 0 and 6 mm are correct too.

String

The chart indicates the number of strands we advise depending on the weight measured at your draw length and the string material.

Length to obtain adviced brace height*:

Bow 74" 72" 70" 68" 66"
Xcurve 1785 mm 1735 mm 1700 mm 1650 mm 1600 mm
Curve N/A 1725 mm 1685 mm 1635 mm 1590 mm

* on 25" 27" Xpro (and most of 25" risers).

Arrows

The Uukha limbs push arrows a steadier way. Therefore, you can choose - with equal power and draw length - more flexible tubes than for laminated limbs.

We advice to respect the tables’ indications of the tubes manufacturers, without shifting towards one or two lower spine cell in the table.

Uukha products are covered with a varnish PU, use water and soap simply to clean them.

In case of impact having deteriorated varnish, be aware that the composite structure is perfectly waterproof and will not absorb water. To preserve the aspect of your product, you can make a final improvement of varnish.

Uukha products are guaranteed (legal guarantee) against any manufacturing defect. In spite of our controls, if you detect a defect, please contact your retailer.

Top / bottom limb location

When the bow is in shooting position, the poundage markings must be upside up.

Profit or loss of bow sight scale mark

Does a profit on bow sight scale mark correspond to a speed profit when we compare two limbs pairs ?

Not necessarily: the bow sight scale mark depends primarily on the archer morphology and the position of the nock point compared to the riser with the maximum draw length.

According to the way in which the two limbs top and bottom work, the height of this nock locator can vary.

None of the traditional adjustments (Brace height, tiller) being made at the maximum draw length, there is no reason that the nock point height is the same one with the maximum draw length.

To do a comparative speed test, we know two methods:

  • Use chronograph.
  • Compare the bow sight scale mark at 70m and at 10m: the smaller the variation the higher the speed.
  • Noise, vibrations

    When the bow is correctly set up, the noise is very short and dampened (a bit like a silent gun) . Limbs stop at once with very few oscillations.

    If it's not the case:

  • Check tiller screws are between medium and max setting (the more the better).
  • Check brace height is what we advice see "Tuning"
  • Use a string made of BCY 8125 or better astroflight (I don't mean other brands don't work but those 2 ones work well).
  • Last and very important, use a good stab with a good damper and a mass at the end.
  • Limb saver has never been for us a solution.
  • Limb tip

    It is an integral part of the structure, so it is very strong. Moreover, it is very compact and elliptic for a better air penetration, and a low inertia.

    The shape is studied to preserve your string serving: we do not change a string after a endurance test of 30,000 cycles at 35" draw length.

    Adaptaters

    They only fit on Uukha limbs.



    Calculate poundage at your draw length

    Change draw length, poundage and validate with "Enter":

    Riser size: 27" 25" 23" 21" 19" 17" 15"
    Limbs size: 66" 68" 70" 72"
    Bow length:
    Your AMO draw length: Tolerance**
    Marked poundage: +- 1#
    Limbs Xcurve Curve Tuulaï/Saïga* Irbis* Tolerance**
    Poundage at your draw length (tiller bolts at medium settings) +- 1#
    Poundage at your draw length (tiller bolts at +5% settings) +- 1#
    Poundage at your draw length (tiller bolts at Upro/UproLite/Xpro max settings (+9%)) +- 1#

    * Nature Evo² are weighed with à 19" handle.

    To measure your AMO draw length, do a mark on your arrow in front of the berger button when the arrow just leaves the clicker. Measure the distance between the mark and the nock in inches and add 1.75.

    ** Tolerance on Nature limbs is 2.5#.

    NB: Results are valid only for Uukha risers (25"). Results for other sizes are based on extrapolations. If you use a riser from an other brand, consider these results as a simple estimation.