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")

Each pair of limbs has its pull weight measured at the median adjustment of the tiller screws. The corresponding poundage is marked on the limbs.
Use our calculator to evaluate the poundage at your draw length:

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".


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

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

Bow 74" 72" 70" 68" 66" 64" 62" 60" 58" 56"
Brace height +-10mm 239 mm 232 mm 225 mm 218 mm 211 mm 205 mm 198 mm 192 mm 186 mm 180 mm

Tiller refers to the distance between the string and top limb, versus the distance between the string and bottom limb.

For Uukha limbs, the most common correct setting is between 0 and 6 mm.

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 advised brace height*:

Bow 74"72"70"68"66"64"62"60"58"56"
S-Curve 1785 mm1735 mm1700 mm1650 mm1600 mm1550 mm1500 mm1450 mm1400 mm1350 mm
Xcurve 1785 mm1735 mm1700 mm1650 mm1600 mm1550 mm1500 mm1450 mm1400 mm1350 mm
Curve N/A1725 mm1685 mm1635 mm1590 mm1540 mm1490 mm1440 mm1390 mm1340 mm

* estimated length for other brand risers.

We recommend following the arrow shaft tables offered by their respective manufacturers.


The poundage markings must be situated in such a way that while the bow is held in a firing position, the writing on the top and bottom limbs would be correctly oriented for reading.

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's 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 may vary.

None of the traditional adjustments (brace height, tiller) are made at the maximum draw length, so there is no reason that the nock point height will be the same when at maximum draw length.

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

  • Use a chronograph.
  • Compare the bow sight scale mark at 70m and at 10m: the smaller the variation, the higher the speed.
  • When the bow is correctly set up, the noise is very short and quiet, a bit like a silenced gun. The limbs will stop at once with very few oscillations.

    If this is not the case:

  • Check that the tiller screws are between medium and max settings, with tighter being better.
  • Check that brace height is set at what we advise in the "Tuning" section.
  • Use a string made of BCY 8125 or Astroflight; other brands work, but those two work especially well.
  • Last and very important, use a quality stabilizer with a good dampener and a mass at the end.
  • Limb savers are not recommended.
  • The tip is an integral part of the limb’s structure, so ours is very strong. Moreover, ours is very compact and elliptical for better aerodynamics, and a lower inertia.

    Our limb tip’s shape has been researched to preserve your string serving: we have maintained a string after an endurance test of 30,000 cycles at a 35" draw length.


    A longer bow improves lateral stability and grouping.


    A wider string angle gives better hook consistency.


    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

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

    Our limbs are designed to provide the best performances in the -5%/+5% range of tiller bolts settings.

    With a +15% setting:

  • You will lose much smoothness.
  • You will lose in terms of stored energy efficiency: the speed increase brought by the added poundage will be lower than expected.
  • The stress increase on the limbs will exceed 10%, corresponding to 5 inches of over-draw, with a risk of early failure and accelerated aging.
  • We consider such a configuration to be out of normal use conditions, and therefore it is not covered by our guarantee.


    Uukha products are covered with a polyurethane varnish. Simply use water and soap to clean them.

    In the event that the varnish is damaged by an impact, be aware that the composite structure is perfectly waterproof and will not absorb water. To preserve the appearance of your product, you can touch up the marred area with nail varnish.


    Uukha products are legally guaranteed against manufacturing defects. If you discover a defect despite our controls, please contact your retailer.

    Calculate poundage at your draw length

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

    Riser size: 15" 17" 19" 21" 23" 25" 27"
    Limbs size: 60" 62" 64" 66" 68" 70" 72"
    Bow length:
    Your AMO draw length:
    Marked poundage:
    Limbs S-Curve Target Tolerance S-Curve Nature Tolerance
    Poundage at your draw length (tiller bolts at medium settings) +- 1# +- 2.5#
    Poundage at your draw length (tiller bolts at -5% settings) +- 1# +- 2.5#
    Poundage at your draw length (tiller bolts at +5% settings) +- 1# +- 2.5#

    Note: Nature are weighed with a 19" handle.

    To measure your AMO draw length, do a mark on your arrow in the middle 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.

    Note: Results are valid only for Uukha risers (25" or 27"). Results for other sizes are based on extrapolations. If you use a riser from another brand, consider these results as a simple estimation.