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{{Confuse|Spring}}
{{Item
|name = Tight spring
|image = [[File:Tight spring.png]]
|release = [[15 August]] [[2016]]
|update = The Beach - Daily Treasure Map Rewards - Satyr Outfit
|members = No
|quest = No
|tradeable = No
|equipable = No
|stackable = Yes
|disassembly = No
|value = 100
|alchable = No
|destroy = Are you sure you want to destroy your Treasure Hunter prize? You cannot reclaim it.
|kept = alwaysinclwild
|examine = Use on a spring cleaner to recharge it.
|weight = 0
|id = 36090
}}
[[File:Tight spring detail.png|left]]
'''Tight springs''' are a reward obtained from various events, including [[Birth by Fire]], [[Deathbeard's Demise]], and [[Aiding the Exile]]. They can also be created using the [[Invention]] skill. They function in exactly the same manner as [[spring]]s, but are not tradeable, and are used to either charge or quick upgrade the [[spring cleaner]]. When charging the spring cleaner, each tight spring will provide one charge. When upgrading the spring cleaner, each tight spring will be consumed immediately and added to the upgrade process, as if a charge were used.

==Creation==
{{Infobox Recipe
|name = Tight spring
|amount= 20
|skill = Invention
|skillXP = 100
|geValue = No
|level = 43
|members = Yes
|misc1 = [[File:Blueprint (Invention).png]] Research: Spring cleaner and Tight springs
|mat1 = Tensile parts
|mat1qty = 120
|mat2 = Subtle components
|mat2qty = 1
}}

===Price estimation===
When the cost of creating tight springs is higher than the cost of [[Spring]]s (currently {{coins|{{GEP|Spring}}}}) then it is not recommended to create them yourself.
;Tensile parts
:''See [[Calculator:Disassembly by material/Tensile]] for more''
{| class="wikitable sortable"
! rowspan="2" | Item
! colspan="2" | No junk reduction
! colspan="2" | Junk reduction 5
! colspan="2" | Junk reduction 9
|-
! Per 20 springs
! Per spring
! Per 20 springs
! Per spring
! Per 20 springs
! Per spring
|-
| {{plink|Maple shieldbow}}
| {{coins|{{GEP|Maple shieldbow}} * 120 / (12 * (1-0.67) * 0.3)}}
| {{coins|{{GEP|Maple shieldbow}} * 6 / (12 * (1-0.67) * 0.3)}}
| {{coins|{{GEP|Maple shieldbow}} * 120 / (12 * (1-0.609) * 0.3)}}
| {{coins|{{GEP|Maple shieldbow}} * 6 / (12 * (1-0.609) * 0.3)}}
| {{coins|{{GEP|Maple shieldbow}} * 120 / (12 * (1-0.58) * 0.3)}}
| {{coins|{{GEP|Maple shieldbow}} * 6 / (12 * (1-0.58) * 0.3)}}
|-
| {{plink|Maple shieldbow (u)}}
| {{coins|{{GEP|Maple shieldbow (u)}} * 120 / (4 * (1-0.703) * 0.3)}}
| {{coins|{{GEP|Maple shieldbow (u)}} * 6 / (4 * (1-0.703) * 0.3)}}
| {{coins|{{GEP|Maple shieldbow (u)}} * 120 / (4 * (1-0.639) * 0.3)}}
| {{coins|{{GEP|Maple shieldbow (u)}} * 6 / (4 * (1-0.639) * 0.3)}}
| {{coins|{{GEP|Maple shieldbow (u)}} * 120 / (4 * (1-0.562) * 0.3)}}
| {{coins|{{GEP|Maple shieldbow (u)}} * 6 / (4 * (1-0.562) * 0.3)}}
|-
| {{plink|Oak shieldbow (u)}}
| {{coins|{{GEP|Oak shieldbow (u)}} * 120 / (4 * (1-0.868) * 0.3)}}
| {{coins|{{GEP|Oak shieldbow (u)}} * 6 / (4 * (1-0.868) * 0.3)}}
| {{coins|{{GEP|Oak shieldbow (u)}} * 120 / (4 * (1-0.789) * 0.3)}}
| {{coins|{{GEP|Oak shieldbow (u)}} * 6 / (4 * (1-0.789) * 0.3)}}
| {{coins|{{GEP|Oak shieldbow (u)}} * 120 / (4 * (1-0.649) * 0.3)}}
| {{coins|{{GEP|Oak  shieldbow (u)}} * 6 / (4 * (1-0.694) * 0.3)}}
|}

;Subtle components
:''See [[Calculator:Disassembly by material/Subtle]] for more''
{| class="wikitable sortable"
! rowspan="2" | Item
! colspan="2" | No junk reduction
! colspan="2" | Junk reduction 5
! colspan="2" | Junk reduction 9
|-
! Per 20 springs
! Per spring
! Per 20 springs
! Per spring
! Per 20 springs
! Per spring
|-
| {{plink|Steel scimitar}}
| {{coins|{{GEP|Steel scimitar}} * 1 / (8 * (1-0.78) * 0.02)}}
| {{coins|{{GEP|Steel scimitar}} * (1/20) / (8 * (1-0.78) * 0.02)}}
| {{coins|{{GEP|Steel scimitar}} * 1 / (8 * (1-0.709) * 0.02)}}
| {{coins|{{GEP|Steel scimitar}} * (1/20) / (8 * (1-0.709) * 0.02)}}
| {{coins|{{GEP|Steel scimitar}} * 1 / (8 * (1-0.624) * 0.02)}}
| {{coins|{{GEP|Steel scimitar}} * (1/20) / (8 * (1-0.624) * 0.02)}}
|-
| {{plink|Mithril scimitar}}
| {{coins|{{GEP|Mithril scimitar}} * 1 / (8 * (1-0.67) * 0.02)}}
| {{coins|{{GEP|Mithril scimitar}} * (1/20) / (8 * (1-0.67) * 0.02)}}
| {{coins|{{GEP|Mithril scimitar}} * 1 / (8 * (1-0.609) * 0.02)}}
| {{coins|{{GEP|Mithril scimitar}} * (1/20) / (8 * (1-0.609) * 0.02)}}
| {{coins|{{GEP|Mithril scimitar}} * 1 / (8 * (1-0.58) * 0.02)}}
| {{coins|{{GEP|Mithril scimitar}} * (1/20) / (8 * (1-0.58) * 0.02)}}
|-
| {{plink|Adamant scimitar}}
| {{coins|{{GEP|Adamant scimitar}} * 1 / (8 * (1-0.56) * 0.02)}}
| {{coins|{{GEP|Adamant scimitar}} * (1/20) / (8 * (1-0.56) * 0.02)}}
| {{coins|{{GEP|Adamant scimitar}} * 1 / (8 * (1-0.509) * 0.02)}}
| {{coins|{{GEP|Adamant scimitar}} * (1/20) / (8 * (1-0.509) * 0.02)}}
| {{coins|{{GEP|Adamant scimitar}} * 1 / (8 * (1-0.448) * 0.02)}}
| {{coins|{{GEP|Adamant scimitar}} * (1/20) / (8 * (1-0.448) * 0.02)}}
|}

===Opportunity cost===
Assuming [[oak shieldbow (u)|unstrung oak shieldbows]] and [[steel scimitar]]s are used, the base cost is {{NoCoins|{{#vardefineecho:dis_cost|{{GEP|Oak  shieldbow (u)}} * 6 / (4 * (1-0.694) * 0.3) + {{GEP|Steel scimitar}} * (1/20) / (8 * (1-0.624) * 0.02)}}|c}} per spring. The average disassembly time for gathering 120 tensile parts and 1 subtle component is {{#vardefineecho:dis_time|{{#expr:(ceil(1/.3671*120)+ceil(1/.0601))*1.2/60}}}} minutes. If the player can earn 1 million coins per hour via other activities, the total cost per spring would become {{NoCoins|{{#expr:{{#var:dis_time}}/60*1000000/20+{{#var:dis_cost}}}}|c}}, making it less economical than buying springs.

However, other components gained from dissassembly may make tight springs worth crafting. This is particularly true if the components are gained as secondary products from other dissassembly based activities. 
{{clear|left}}

==Drop sources==
{{Dropping monsters list|Tight spring}}

==Trivia==
* When it was first released, charging the spring cleaner with both the tradeable [[spring]] and the tight spring in the inventory used up both types, but charged only half the amount.
* It was originally named "Spring" until [[5 September]] [[2016]].

{{Spring cleaner}}
{{Devices}}