tuning & maintenance


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.

Arc 74" 72" 70" 68" 66" 64" 62" 60" 58" 56"
Band +-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*:

Arc 74" 72" 70" 68" 66" 64" 62" 60" 58" 56"
S-Curve 1785 mm 1735 mm 1700 mm 1650 mm 1600 mm 1550 mm 1500 mm 1450 mm 1400 mm 1350 mm
Xcurve 1785 mm 1735 mm 1700 mm 1650 mm 1600 mm 1550 mm 1500 mm 1450 mm 1400 mm 1350 mm
Curve N/A 1725 mm 1685 mm 1635 mm 1590 mm 1540 mm 1490 mm 1440 mm 1390 mm 1340 mm

* estimated length for other brand risers.

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


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.


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.